DeFi — short for decentralized finance — is a system of financial apps that run on blockchains instead of inside banks. You can trade coins, lend money, borrow against your crypto and earn interest, all from your own wallet, without opening an account or asking anyone’s permission.
How DeFi works
DeFi apps are built from smart contracts: programs that hold funds and follow fixed rules. Instead of a bank deciding who gets a loan, a lending protocol automatically gives one to anyone who deposits enough collateral. Instead of a stock exchange matching buyers and sellers, a decentralized exchange (DEX) uses pools of funds supplied by users.
What can you do in DeFi?
- Trade tokens directly from your wallet on a DEX.
- Lend your crypto and earn interest from borrowers.
- Borrow stablecoins against your crypto without selling it.
- Earn yield by providing liquidity to trading pools.
- Hold stablecoins to save in dollars outside the banking system.
The honest risks
DeFi removes the bank — including the bank’s safety net. Smart contracts can have bugs that hackers exploit, and there is no deposit insurance if a protocol fails. “Yield” that looks too good usually comes from token inflation or risky strategies. Fake DeFi websites that copy real ones are also a major scam: always check the address carefully.
DeFi is one of crypto’s most useful inventions and one of its most dangerous playgrounds. Start with small amounts on well-known protocols, and never connect your main wallet to a site you have not verified.
