What is Decentralized Finance (DeFi)

Decentralised Finance (DeFi) refers to the ecosystem of financial services and products lending, borrowing, trading, saving, insurance, and derivatives built on public blockchains using smart contracts, operating without banks, brokerages, or any centralised financial intermediary.

THE DEFI VISION

Traditional finance (TradFi) requires trust in institutions: banks hold your deposits, brokers execute your trades, insurance companies underwrite your policies. Each intermediary extracts fees, imposes restrictions (minimum balances, operating hours, geographic limitations), and introduces counterparty risk. DeFi replaces institutional trust with cryptographic guarantees smart contracts execute financial transactions automatically, transparently, and globally, available to anyone with internet access and a crypto wallet.

CORE DEFI PRIMITIVES

Decentralised Exchanges (DEXs): Trade tokens directly from your wallet without a company controlling the order matching. Uniswap facilitates billions in daily trading volume.
Lending and Borrowing: Deposit cryptocurrency to earn interest, or post collateral to borrow assets. Aave and Compound use algorithmic interest rates that adjust based on supply and demand. No credit checks collateral speaks for itself.
Liquid Staking: Stake ETH or SOL and receive a liquid token (stETH, mSOL) representing your staked position usable in other DeFi protocols. Lido Finance manages over 30% of all staked ETH.
Stablecoins: MakerDAO's DAI is a decentralised stablecoin created by locking crypto collateral in smart contracts. Sky Protocol (formerly Maker) manages billions in collateralised debt positions.
Yield Aggregators: Yearn Finance and similar protocols automatically route user funds to the highest-yielding DeFi strategies, compounding returns automatically.
Perpetual Futures: dYdX, Hyperliquid, and GMX offer leveraged perpetual futures trading entirely on-chain.

THE DEFI STACK: KEY METRICS

Total Value Locked (TVL) measures the total assets deposited in DeFi protocols a key health indicator. DeFiLlama tracks TVL across 200+ chains. At its 2021 peak, DeFi TVL exceeded $180 billion.

DEFI RISKS

Smart contract vulnerabilities (the leading cause of DeFi hacks — over $3 billion lost in 2022 alone), oracle manipulation, liquidity crises, and regulatory uncertainty all represent significant risks in the DeFi ecosystem.

Terms in addition to the Decentralized Finance (DeFi)

Blockchain

A blockchain is a subset of a distributed database. The Bitcoin inventors originally prototyped the system in 2008. This modern database is made up of separate blocks that are connected together in a chronological chain. Blockchains may be used to store a wide range of data types. It has mostly been utilized as a public ledger for bitcoin transactions to date. A peer-to-peer network comprised of independent nodes uses a consensus process to ensure the blockchain's security and legitimacy. Each node in the network keeps a public and immutable copy of the data.

2 Factor Authentication (2FA)

2 Factor Authentication is a security measure with two layers. It is used by the majority of cryptocurrency exchanges. To log in, you must provide not only a password, but also a code obtained, for example, from the Google authenticator.

Airdrop

An airdrop is a method of distributing coins. End users can typically obtain coins for free or in exchange for doing a small task, such as subscribing to a newsletter, sending a tweet, or inviting others via a personal affiliate link. Cryptocurrency airdrops — the act of depositing cryptocurrency into public crypto wallets — are utilized as a marketing, liquidity creation, and network bootstrapping technique for many different types of blockchain initiatives.

Altcoin

Altcoin - "alternative coin" - is any kind of digital currency other than Bitcoin. Since the launch of Bitcoin, the world's first digital currency, many altcoins (as well as supporting blockchains) have been created. Altcoin digital currencies share many similarities to Bitcoin, but consistently and have significant differences. There are about 20,000 altcoins, and this number is expected to grow significantly in the coming years. Altcoins often develop Bitcoin features. Ethereum, currently the most widely used blockchain, supports digital contracts and separate applications where Bitcoin does not. Altcoins are also often created to cater to the needs of different users. The Litecoin blockchain, for example, can process payments quarterly for the duration of Bitcoin.

Cold Storage

Cold storage is the way to store cryptocurrency offline. The word refers to the use of offline wallets that are not connected to the internet. Cold storage is the most secure way to keep cryptocurrencies since an offline currency becomes less likely to be hacked and stolen. Paper wallets, printed renditions of private keys, and offline hardware and software wallets are all examples of cold storage.