DeFi explained: understanding decentralized finance.
DeFi, decentralized finance, is an ecosystem of financial services that works without banks, brokers, or traditional intermediaries. Everything runs on smart contracts: code that automatically executes financial operations on the blockchain.
Why DeFi exists
In traditional finance, everything goes through intermediaries. To borrow, you go to a bank. To trade assets, you use a broker. DeFi proposes an alternative: the same financial services, executed by code on a blockchain.
Pillars of DeFi
DEX, Decentralized Exchanges
DEXs (Uniswap, SushiSwap) let you swap tokens directly between users using liquidity pools instead of traditional order books.
Lending & Borrowing
Protocols like Aave and Compound let you lend your crypto for interest or borrow against collateral. Rates are determined by supply and demand in real-time.
Yield Farming & Staking
Yield farming means providing liquidity to protocols for rewards. Staking means locking tokens to secure a network and earn returns. Both carry specific risks.
Stablecoins
Stablecoins (USDT, USDC, DAI) are pegged to a traditional currency, usually the dollar. They serve as a stability refuge in the crypto ecosystem.
Real risks of DeFi
Smart contract risk
Smart contracts are code. They can contain bugs or vulnerabilities. In 2024 alone, over $1.7 billion was lost to DeFi protocol exploits.
Impermanent loss
When you provide liquidity to a pool, the value of your tokens can change compared to simply holding them. This loss is real and can erase your fee earnings.
Rug pulls
Fraudulent projects that attract funds then disappear. Common in low-cap tokens and unaudited protocols.
FAQ
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