Glossary

The return on 10-year US government bonds. Considered the global risk-free rate benchmark — the single most important number in global finance. All risk asset valuations (stocks, real estate, credit) are priced relative to this yield.

The hard-coded maximum supply of Bitcoin. No more than 21 million BTC will ever exist, enforced by the Bitcoin protocol and verified by every full node. This programmatic scarcity is Bitcoin's most fundamental property.

A blockchain attack where a single entity controls more than 50% of the network's mining power (PoW) or staked tokens (PoS), allowing them to double-spend and reorganize recent transactions. Economically infeasible on large networks like Bitcoin.

A type of decentralized exchange that uses a mathematical formula (rather than an order book) to price assets. Liquidity is provided by users who deposit token pairs into pools. Uniswap pioneered the constant-product AMM model.

A leading DeFi lending protocol allowing users to deposit assets to earn interest or borrow against collateral. Invented flash loans, variable and stable interest rates, and credit delegation. Governed by AAVE token holders.

A stablecoin that maintains its peg through algorithmic supply adjustments rather than holding collateral reserves. The failure of Terra/UST in May 2022 — destroying $40 billion in value in 72 hours — demonstrated the fragility of under-collateralized algorithmic designs.

An AI system that can take a goal, reason through steps, use tools (APIs, databases, browsers, blockchain wallets), execute actions, observe results, and iterate — autonomously, without human direction at each step. Increasingly used in DeFi automation and financial research.

Using computer programs to execute trades based on predefined rules or learned patterns at speeds and frequencies impossible for humans. Accounts for over 60–70% of equity market volume. AI is increasingly replacing rule-based algorithms with adaptive models.

Laws, regulations, and procedures designed to prevent criminals from disguising illegal funds as legitimate income. Crypto exchanges are classified as financial institutions in most jurisdictions and must maintain AML programs including transaction monitoring and suspicious activity reporting.

An Ethereum upgrade enabling smart contract wallets to replace externally owned accounts. Enables features like social recovery, gasless transactions, batch operations, and multi-sig by default — dramatically improving Web3 user experience.

A system of exchange where goods or services are traded directly for other goods or services, without using money as an intermediary. The fundamental problem — the double coincidence of wants — prevented barter from scaling beyond small communities.

The 1944 international monetary system in which the US dollar was pegged to gold at $35/oz and all other currencies were pegged to the dollar. It made the dollar the world's reserve currency and governed global finance from 1944 to 1971.

The expanded bloc of major emerging economies — Brazil, Russia, India, China, South Africa, plus new members (UAE, Ethiopia, Egypt, Iran, Saudi Arabia). Pursuing alternative payment systems, gold-backed trade settlement, and reduced dollar dependence.

The first decentralized digital currency, created by Satoshi Nakamoto in 2009. A peer-to-peer electronic cash system with a fixed supply of 21 million coins, secured by proof-of-work consensus, with no central issuer or authority.

"Bitcoin: A Peer-to-Peer Electronic Cash System" — the 9-page document published by Satoshi Nakamoto on October 31, 2008, describing the first cryptographically secure, decentralized digital currency and the blockchain architecture underlying it.

The event, occurring approximately every 4 years (210,000 blocks), in which Bitcoin's block subsidy is cut in half. This reduces the rate of new supply, historically preceding major price appreciation. The April 2024 halving reduced the reward to 3.125 BTC/block.

Exchange-Traded Funds holding Bitcoin directly, approved by the SEC in January 2024. BlackRock's IBIT became the fastest-growing ETF in history, enabling traditional investors to gain Bitcoin exposure through brokerage accounts and retirement funds.

A distributed, append-only ledger maintained simultaneously by thousands of nodes worldwide. Transactions are grouped into blocks, each containing the cryptographic hash of the prior block, creating an immutable chain. No central owner; tamper-resistant by design.

The newly created cryptocurrency awarded to the miner who successfully adds a valid block to the blockchain. In Bitcoin, this started at 50 BTC in 2009 and halves every 4 years. After April 2024, it is 3.125 BTC per block.

The thesis, attributed to Vitalik Buterin, that a blockchain can only optimize two of three properties simultaneously: security, scalability, and decentralization. Different blockchains make different trade-offs across this triangle.

A computer science problem about how distributed nodes reach consensus when some may be malicious or unreliable — without a central coordinator. Bitcoin's proof-of-work was the first practical solution to this problem in a trustless setting.

The difference between the highest price buyers will pay (bid) and the lowest price sellers will accept (ask). The spread represents the implicit cost of trading and a key measure of market liquidity. Tighter spreads = more liquid market.

Money that has intrinsic value as a physical commodity — gold, silver, salt, cowrie shells, cacao beans. The earliest form of money used by human civilizations worldwide.

The economic phenomenon whereby newly created money enriches those who receive it first (banks, asset holders, government contractors) before prices rise, at the expense of those further from the money creation point. Named after 18th century economist Richard Cantillon.

A digital form of a sovereign country's fiat currency, issued and controlled directly by the central bank. Unlike bank deposits, CBDCs are a direct liability of the central bank. Over 130 countries are researching or piloting CBDCs.

The system by which banks in different countries hold accounts with each other to facilitate international wire transfers. A US dollar transfer to Japan may pass through 3–5 correspondent banks, each taking days and fees. Blockchains aim to replace this infrastructure.

A loosely organized group of cryptographers and privacy activists active from the 1980s–2000s who believed encryption was essential for individual freedom. Their work produced PGP, Tor, b-money, Hashcash, and ultimately Bitcoin.

The number of blocks added on top of the block containing a specific transaction. Each confirmation makes a transaction exponentially harder to reverse. Bitcoin transactions are generally considered irreversible after 6 confirmations (~1 hour).

The ratio of collateral value to loan value in a DeFi lending position. Most protocols require over-collateralization (e.g., deposit $150 to borrow $100). When the ratio falls below the liquidation threshold, the position is automatically liquidated.

The dominant decentralized oracle network providing tamper-resistant price feeds, verifiable randomness, and cross-chain interoperability to smart contracts on 20+ blockchains. Secures hundreds of billions in DeFi value.

A protocol that allows tokens and data to move between different blockchain networks. Bridges represent a major attack surface — over $2 billion was stolen from bridges in 2022 (Ronin, Wormhole, Nomad) through smart contract exploits.

The requirement in a barter economy that both parties in a trade must want exactly what the other has at the same moment. This constraint made large-scale trade impossible and created the demand for money.

The process by which countries reduce dependence on the US dollar for international trade, reserves, and settlements. Driven by BRICS+ nations, commodity trade in alternative currencies, and geopolitical tensions following the weaponization of SWIFT against Russia.

A database shared, synchronized, and replicated across multiple geographic locations, institutions, or nodes. No single entity controls it. Blockchain is the most widely known type of distributed ledger, but other architectures (DAG, hashgraph) also exist.

An organization governed by smart contracts and token-holder votes rather than traditional management structures. Rules are transparent and automatically enforced on-chain. Examples: MakerDAO, Uniswap DAO, Compound, Aave, Nouns DAO.

A globally unique identifier created, owned, and controlled by the individual — not by a registrar, authority, or company. DIDs are the foundation of self-sovereign digital identity on the blockchain, standardized by the W3C.

Financial services — lending, borrowing, trading, insurance, derivatives — built on blockchain smart contracts without traditional intermediaries like banks, brokerages, or exchanges. Anyone with a wallet can access DeFi protocols globally.

The decentralized, crypto-backed stablecoin issued by MakerDAO. Minted by locking ETH or other approved collateral into Maker Vaults at over-collateralized ratios. Governed entirely by MKR token holders through on-chain voting.

An investment strategy of buying a fixed dollar amount of an asset at regular intervals regardless of price. Reduces the impact of volatility and eliminates the need to time the market. Favored by long-term Bitcoin and index investors.

Financial contracts whose value is derived from an underlying asset — options, futures, swaps, perpetuals. The global derivatives market exceeds $700 trillion notional value. Crypto derivatives include Bitcoin options (Deribit), perpetual futures (Binance, Bybit), and on-chain options (Lyra, Dopex).

The world's programmable blockchain, launched in 2015 by Vitalik Buterin and co-founders. Introduced smart contracts — self-executing code on-chain — enabling DeFi, NFTs, DAOs, and the entire Web3 ecosystem. Second largest blockchain by market cap.

The runtime environment that executes smart contracts on Ethereum and EVM-compatible blockchains (Polygon, BNB Chain, Avalanche, Arbitrum, etc.). Smart contracts compiled to EVM bytecode can run on any EVM chain.

A decentralized naming system on Ethereum that maps human-readable names (kevan.eth) to Ethereum addresses. Similar to DNS for the internet — replaces a string of hex characters with a readable identifier.

Heightened KYC scrutiny applied to high-risk customers — Politically Exposed Persons (PEPs), customers from high-risk jurisdictions, or those with complex ownership structures. Requires source of funds documentation, manual review, and ongoing enhanced monitoring.

Currency with no intrinsic value that is declared legal tender by government decree. Its value derives entirely from collective trust and the government's authority to require it for payment of taxes. All modern national currencies are fiat money.

The banking system in which commercial banks hold only a fraction of customer deposits in reserve, lending the rest out. This allows the money supply to expand far beyond the physical currency base. Requires constant depositor confidence to function.

The central bank of the United States, established in 1913. Controls monetary policy through the federal funds rate, open market operations, and reserve requirements. Its dual mandate is maximum employment and stable prices (2% inflation target).

The interest rate at which banks lend money to each other overnight. Set by the Federal Reserve's FOMC. When raised, it increases borrowing costs throughout the economy, slowing inflation. When cut, it stimulates spending and growth.

An uncollateralized loan that is borrowed and repaid within the same blockchain transaction. If the loan isn't repaid within the transaction, the entire operation reverts. Used for arbitrage, collateral swaps, and (unfortunately) protocol attacks.

The periodic payment between long and short positions in perpetual futures used to keep the perpetual price aligned with the spot price. Positive funding = longs pay shorts (market is bullish). Negative funding = shorts pay longs.

Dividing a high-value asset into many smaller units to enable broader investor access. Tokenization makes fractionalization programmable — a $10M office building can be divided into 10 million $1 tokens, each representing proportional ownership.

The Financial Action Task Force requirement that VASPs must collect and share identifying information about senders and receivers for transfers above $1,000. The blockchain's lack of native identity creates implementation challenges requiring separate data transmission protocols.

A monetary system in which a country's currency is directly tied to gold at a fixed exchange rate. Under the classical gold standard (1870–1914), currencies were fully convertible to gold. The US ended gold convertibility in 1971 under Nixon.

The very first block of the Bitcoin blockchain, mined by Satoshi Nakamoto on January 3, 2009. It contained a now-famous Easter egg headline: 'Chancellor on brink of second bailout for banks' — a message about the broken financial system Bitcoin was built to transcend.

The cost paid by users to execute transactions or smart contracts on Ethereum, denominated in ETH (specifically gwei). Fees compensate validators for computation and storage. EIP-1559 (2021) introduced a base fee that is burned, making ETH deflationary under high demand.

A token that grants holders voting rights over a protocol's parameters, treasury, and future development. Examples: UNI (Uniswap), COMP (Compound), AAVE, MKR (MakerDAO). Token-weighted voting is the most common governance model.

Inflation exceeding 50% per month, typically caused by government money printing to fund deficits. Famous examples: Weimar Germany (1923), Zimbabwe (2008), Venezuela (2016–2019). Always follows the pattern: excessive printing → loss of confidence → price spiral → currency collapse.

A mathematical algorithm that converts any input into a fixed-length string of characters (the hash) that is unique to that input. Even a tiny change in the input produces a completely different hash. Bitcoin uses SHA-256. Essential for blockchain security.

The 4-part legal standard from the 1946 Supreme Court case SEC v. Howey Co. used to determine if an asset is a security: (1) investment of money, (2) in a common enterprise, (3) with expectation of profit, (4) from others' efforts. Pivotal for classifying crypto assets.

A decentralized, peer-to-peer file storage protocol. Files are addressed by content hash (not server location), meaning they can be served by anyone holding a copy. Used to store NFT metadata and Web3 application assets.

The opportunity cost suffered by liquidity providers when asset prices change relative to when they deposited. If ETH doubles, liquidity providers end up with less ETH (and more stablecoins) than if they had simply held. Becomes permanent when you withdraw.

The ability of different blockchain networks to communicate and exchange value without intermediaries. Achieved through bridges, atomic swaps, and cross-chain messaging protocols. Critical for a multi-chain future where assets and data flow freely.

A mathematical formula for determining the optimal fraction of capital to bet on each trade to maximize long-run compound growth without risking ruin. Most professionals use half-Kelly to reduce volatility.

The regulatory process by which financial services firms verify the identity of their customers. Typically includes name, date of birth, address verification, and government ID. Digital asset platforms must implement KYC under anti-money laundering regulations globally.

A Layer 2 payment protocol built on top of Bitcoin enabling near-instant, ultra-low-fee transactions. Uses payment channels that settle on-chain periodically. Enables Bitcoin to function as everyday payment currency at scale.

A base blockchain protocol responsible for consensus, security, and data availability — Bitcoin, Ethereum, Solana, Avalanche. All transactions ultimately settle on L1, which provides the root of trust for everything built on top.

A scaling solution built on top of a Layer 1 blockchain that processes transactions off-chain while inheriting L1 security. Ethereum L2s (Arbitrum, Optimism, Base, zkSync) offer dramatically lower fees and higher throughput.

A smart contract holding two or more tokens that enables trading on a decentralized exchange. Liquidity providers deposit equal values of each token, earning fees from trades. The pool's balance determines the exchange price via the AMM formula.

Earning protocol governance tokens as additional rewards for providing liquidity. Used to bootstrap liquidity in new DeFi protocols — early LPs receive tokens that could appreciate significantly. Also called 'DeFi farming.'

The automatic process in DeFi lending by which a borrower's collateral is sold to repay their debt when the collateral value drops below the liquidation threshold. Liquidator bots claim the collateral at a discount (typically 5–10%) as incentive.

The catastrophic failure of the Terra blockchain's algorithmic stablecoin system. UST's peg broke in May 2022, triggering a death spiral: falling UST → mint more LUNA → LUNA value collapses → more UST redemptions. $40B destroyed in 72 hours. The defining DeFi cautionary tale.

An AI model trained on massive amounts of text data that learns to generate coherent, contextually relevant language. GPT-4, Claude, Gemini, and Llama are LLMs. They power financial analysis, document processing, trading signal generation, and AI tutors like Money.

A chain of forced position closures where over-leveraged positions triggering liquidations cause price moves that in turn trigger more liquidations. A key mechanism behind dramatic sudden price swings in crypto markets.

The total amount of money circulating in an economy, including cash, checking accounts, and near-money assets like savings accounts. Growth in M2 is closely tracked as an inflation indicator. The US M2 grew from $700B in 1971 to over $21T by 2024.

The process of competing to add new blocks to a proof-of-work blockchain by repeatedly hashing block data until a valid hash (meeting the difficulty target) is found. Successful miners receive newly created cryptocurrency as a block reward.

The 'memory pool' — a holding area for unconfirmed transactions broadcast to the network. Miners select transactions from the mempool, typically prioritizing those paying higher fees. During network congestion, mempool size and fees spike.

A data structure used in blockchains to efficiently summarize and verify large sets of data. Bitcoin uses Merkle trees to organize transactions in a block, enabling lightweight clients to verify transaction inclusion without downloading the entire blockchain.

The most widely used browser and mobile wallet for Ethereum and EVM-compatible blockchains. A browser extension that injects Web3 APIs into websites, enabling 'Connect Wallet' functionality. Over 30 million monthly active users.

Profit that can be extracted by miners/validators by reordering, inserting, or censoring transactions in a block. MEV bots front-run, sandwich-attack, and arbitrage DeFi users. Amounts to hundreds of millions annually on Ethereum.

A subset of AI where systems learn patterns from data rather than being explicitly programmed. Essential for fraud detection, credit scoring, algorithmic trading, and risk management in modern financial services.

A firm or individual that continuously quotes buy and sell prices for an asset, earning the spread between them. Market makers provide liquidity — without them, finding a counterparty for a trade becomes slow and expensive.

The EU's comprehensive crypto regulatory framework, effective 2024. Creates licensing requirements for crypto exchanges, wallet providers, and stablecoin issuers. Requires all stablecoin issuers in Europe to maintain full liquid reserves and undergo bank-grade examination.

A security mechanism requiring multiple private keys to authorize a transaction or protocol action. A 3-of-5 multisig requires any 3 of 5 designated keyholders to sign. Standard practice for securing DeFi protocol treasuries and upgrade authority.

President Nixon's August 15, 1971 announcement ending the US dollar's convertibility to gold, effectively terminating the Bretton Woods system. This launched the modern era of fiat money — the first time in history that the entire global economy operated without a commodity anchor.

A computer participating in a blockchain network by downloading, verifying, and storing the blockchain history. Full nodes independently verify all rules. Mining nodes compete to produce blocks. A higher node count means greater decentralization.

A unique digital token on a blockchain representing ownership of a specific asset — art, music, game items, real estate, credentials. Non-fungible means not interchangeable 1:1 with other tokens. Technically an ownership record, not necessarily the underlying file.

AI technology enabling computers to understand, interpret, and generate human language. In finance: parsing earnings calls, analyzing news sentiment, extracting data from contracts, and powering conversational banking interfaces.

A service that provides real-world external data to blockchain smart contracts — asset prices, weather data, sports results. Chainlink is the dominant oracle network. Oracle failures or manipulation represent a major DeFi security risk.

The requirement to deposit more value than you borrow. DAI requires 150%+ collateral; Aave requires 120%+. The buffer protects the protocol during price drops before automatic liquidation kicks in.

Embedding regulatory rules — KYC/AML whitelists, transfer restrictions, investor accreditation checks — directly into the smart contract logic of a tokenized asset. Automates compliance enforcement without manual review on every transaction.

A list of buy orders (bids) and sell orders (asks) in a market, sorted by price. The gap between the best bid and best ask is the spread. Centralized exchanges use order books; DEXes use AMMs instead.

The total number of outstanding futures or options contracts that have not been settled. Rising OI with rising price = new money entering, bullish. Rising OI with falling price = short pressure. OI crashes signal position liquidations.

Analysis of data publicly recorded on blockchain networks — wallet movements, exchange flows, miner selling, long-term holder accumulation, and whale transactions. Provides unique market intelligence not available in traditional finance.

The Office of Foreign Assets Control Specially Designated Nationals list — individuals and entities sanctioned by the US government with whom US persons are prohibited from transacting. Crypto exchanges must screen all users against this list in real-time.

Decision-making processes executed directly through smart contracts — proposals are submitted, votes are cast with tokens, and approved changes are automatically implemented without any human intermediary. Provides transparency but is vulnerable to voter apathy and plutocracy.

The arrangement, negotiated between the US and Saudi Arabia in 1974, through which oil is priced and settled exclusively in US dollars globally. This creates permanent structural demand for dollars worldwide, underpinning US dollar dominance.

A consensus mechanism requiring miners to expend real computational energy solving a cryptographic puzzle to earn the right to add a block. Makes attacks economically prohibitive — you must out-compute the entire honest network simultaneously.

A consensus mechanism where validators lock up cryptocurrency as collateral and are selected to produce blocks proportional to their stake. Ethereum switched to PoS in September 2022 (The Merge), reducing energy consumption by ~99.9%.

A secret 256-bit number that proves ownership of blockchain assets and is used to sign transactions. Never shared with anyone. Whoever controls the private key controls the assets. Losing it means permanent loss of access to all associated funds.

Futures contracts with no expiration date. Use a funding rate mechanism (longs pay shorts or vice versa) to keep the perpetual price anchored to the spot price. The dominant trading instrument in crypto — often more liquid than spot markets.

A monetary policy tool where a central bank purchases large quantities of government bonds and other securities to inject money into the financial system, lower interest rates, and stimulate economic activity. The Fed created $3T+ through QE in 2020 alone.

The minimum percentage of voting tokens that must participate in a governance vote for the result to be valid. Low quorum means small groups of large holders can pass proposals. A persistent challenge in DAO governance.

An Ethereum scaling technique that executes transactions off-chain and posts compressed transaction data back to Ethereum. Optimistic rollups (Arbitrum, Optimism) assume transactions are valid; ZK rollups (zkSync, StarkNet) use cryptographic proofs to verify validity.

A smart contract exploit where a malicious contract repeatedly calls back into the target contract before the first call completes, draining funds. The DAO hack (2016) — which drained $60M from Ethereum — was a reentrancy attack.

The process of converting ownership rights in physical or traditional financial assets — real estate, bonds, art, commodities, private equity — into blockchain tokens. Enables 24/7 trading, fractional ownership, instant settlement, and global accessibility.

A type of machine learning where an agent learns to make decisions through trial and error, receiving rewards for good decisions and penalties for bad ones. Applied to algorithmic trading strategy optimization and autonomous DeFi portfolio management.

An automated digital investment platform that uses algorithms to build and manage portfolios based on user risk tolerance, goals, and time horizon. Betterment, Wealthfront, and Schwab Intelligent Portfolios are examples. Use ML for portfolio optimization.

A US SEC exemption allowing companies to raise capital through private placements without SEC registration. Reg D 506(b) allows up to 35 non-accredited investors; 506(c) is accredited investors only. The most common exemption for security token offerings in the US.

A measure of asset scarcity calculated as the ratio of total existing supply to annual new production. Gold's S2F is ~60. Bitcoin's S2F roughly doubles with each halving, reaching ~120 after April 2024 — making Bitcoin mathematically harder than gold.

Debt issued by a national government, primarily through bond markets. The US national debt exceeds $35 trillion. Rising debt-to-GDP ratios and increasing interest costs (now over $1T/year in the US) raise structural sustainability questions.

Society for Worldwide Interbank Financial Telecommunication — a messaging network used by 11,000+ financial institutions in 200+ countries to communicate payment instructions. Not a payment system itself — actual money movement happens through correspondent bank relationships.

The pseudonymous creator(s) of Bitcoin, who published the Bitcoin whitepaper in October 2008 and launched the network in January 2009. Satoshi mined approximately 1 million BTC in Bitcoin's early days, none of which has ever moved.

The smallest unit of Bitcoin, equal to 0.00000001 BTC (one hundred millionth of a Bitcoin). Named after Bitcoin's creator. As Bitcoin's price rises, satoshis become the practical unit for everyday transactions.

Secure Hash Algorithm 256-bit — the cryptographic hash function used by Bitcoin. It produces a 256-bit (64 hex character) digest from any input. The basis of Bitcoin's proof-of-work mining and block linking.

Self-executing code deployed on a blockchain that automatically enforces agreement terms when predefined conditions are met. Immutable once deployed. The foundation of DeFi, NFTs, DAOs, and token-based systems.

The primary programming language for writing Ethereum smart contracts. Statically typed, high-level, and deliberately sandboxed to prevent attacks. Most DeFi protocols, NFT contracts, and DAOs are written in Solidity.

A 12 or 24-word sequence that encodes a wallet's master private key. Generated from the BIP-39 word list. Anyone with the seed phrase can fully reconstruct the wallet and steal all assets. Must be stored offline and never digitally photographed.

The practice of holding your own private keys rather than entrusting them to an exchange or custodian. 'Not your keys, not your coins.' Self-custody eliminates counterparty risk but creates sole responsibility for security.

A non-transferable NFT that represents identity, credentials, achievements, or reputation. Cannot be sold or transferred — permanently bound to a wallet. Proposed as the foundation for decentralized identity and verifiable on-chain credentials.

A digital identity model where individuals control their own identity data without depending on a centralized authority. On-chain identity is built around cryptographic proofs that can be verified without disclosing unnecessary personal information.

The difference between the expected price of a trade and the actual execution price, caused by insufficient liquidity or price movement between order placement and confirmation. Setting slippage tolerance too high enables front-running attacks.

A cryptocurrency designed to maintain a stable value, typically pegged to the US dollar. Achieved through fiat reserves (USDC, USDT), crypto over-collateralization (DAI), or algorithmic mechanisms. The bridge between crypto and traditional finance.

A digital token that represents ownership in a real-world financial asset — equity, debt, real estate — and is classified as a security under applicable law. Must comply with securities regulations including registration or exemption requirements.

A legal entity created to isolate assets for tokenization — ring-fencing specific property, loan portfolios, or other assets. The SPV holds the physical asset; investors hold tokens representing equity or debt interests in the SPV.

A regulatory filing a financial institution must submit to FinCEN when it suspects a transaction involves money laundering or other financial crime. Crypto exchanges are required to file SARs under the Bank Secrecy Act.

An off-chain, gasless governance voting system widely used by DeFi protocols. Votes are signed messages stored on IPFS, not transactions, making participation free. Used for signaling before on-chain execution of approved proposals.

The total dollar value of assets deposited in a DeFi protocol. The primary metric for DeFi protocol size. At DeFi's peak in late 2021, total TVL across all protocols exceeded $200 billion. Ethereum accounts for the majority of DeFi TVL.

US government bonds or money market funds represented as blockchain tokens, paying holders actual Treasury yields. BlackRock's BUIDL, Franklin Templeton OnChain, and Ondo Finance OUSG are leading examples with $1B+ combined AUM.

Instant atomic settlement — the transfer of asset ownership and payment happening simultaneously and immediately at the moment of trade. Blockchain enables T+0 settlement, compared to T+2 (2-day) settlement in traditional securities markets.

The process of converting real-world assets or rights into digital tokens on a blockchain, enabling fractional ownership, programmable transfers, and global accessibility. BlackRock CEO Larry Fink called it 'the next generation for markets.'

A decentralized indexing protocol for querying blockchain data efficiently. Applications use GraphQL queries to access indexed blockchain data through The Graph's subgraphs, enabling complex data retrieval that would be impractical to do directly from nodes.

A smart contract mechanism that enforces a mandatory delay (e.g., 48 hours) between a governance vote passing and the change being executed on-chain. Gives users time to review and exit if they disagree with an approved change.

Unspent Transaction Output — Bitcoin's accounting model. Rather than tracking balances, Bitcoin tracks individual 'coins' (outputs) that have been received but not yet spent. Your wallet balance is the sum of all your UTXOs.

The most widely used decentralized exchange, built on Ethereum. Pioneered the AMM model with its constant product formula (x·y=k). Through v3, it introduced concentrated liquidity, allowing LPs to focus capital in specific price ranges for higher fee capture.

USD Coin — the dollar-backed stablecoin issued by Circle. Fully reserved with cash and short-duration US Treasury bills. Published monthly attestations by major accounting firms. Preferred by institutions and regulated DeFi applications.

The largest stablecoin by market cap ($90B+), issued by Tether. Pegged to USD, backed by cash, Treasury bills, and other assets. Dominant in offshore crypto markets. Long-criticized for opacity; publishes quarterly attestations rather than full audits.

The degree of price fluctuation in an asset over time. Measured as standard deviation of returns. Bitcoin's annualized volatility averages 60–80%, compared to 15–20% for equities. High volatility creates both opportunity and risk.

Any business that exchanges, transfers, or custodies virtual assets for clients — crypto exchanges, wallet providers, token issuers — as defined by FATF guidance. VASPs must implement KYC/AML programs equivalent to traditional financial institutions.

The next evolution of the internet built on decentralized protocols, enabling user ownership of data and digital assets through cryptographic keys, token economics, and permissionless participation. Contrasted with Web2's centralized platform model.

A software or hardware tool that stores private keys and enables interaction with blockchains. Non-custodial wallets (MetaMask, Phantom, Ledger) give users full control. 'Connect wallet' is replacing 'sign in with Google' as the Web3 identity layer.

The practice of maximizing returns by actively moving assets between DeFi protocols to capture the highest available yield — through trading fees, liquidity mining rewards, or interest. Requires active management and carries smart contract and market risk.

The return earned on a digital asset through activities like staking, lending, or providing liquidity in decentralized protocols. Expressed as APY (Annual Percentage Yield) including compounding or APR (Annual Percentage Rate) without.

A cryptographic protocol that allows one party to prove they know something without revealing the information itself. A ZK proof can prove you're over 18 without revealing your birthdate, or prove you have sufficient funds without revealing your balance.