Crypto Lending: CeFi vs DeFi

Borrowing and Lending Crypto

Crypto lending lets holders earn yield by lending out their assets, and lets others borrow — usually by posting crypto as collateral. There are two broad worlds. **CeFi (centralized finance)**: a company takes your deposit, lends it out, and pays you interest — you trust the company. **DeFi (decentralized finance)**: a smart-contract protocol like Aave or Compound matches lenders and borrowers automatically, with the rules enforced by code and collateral held on-chain — you trust the contract and the collateral. Both let you earn on idle crypto or borrow against your holdings, but the trust model and the risks are fundamentally different.

Why People Borrow Against Crypto

A common reason to borrow against crypto rather than sell it is to get liquidity (cash or stablecoins) while keeping exposure to the asset — and, in some jurisdictions, without triggering a taxable sale. A holder can post bitcoin or ether as collateral, borrow a stablecoin against it, and use that stablecoin, while still owning the underlying (and repaying to reclaim it). Others borrow to lever up or to fund activity. The lender side, meanwhile, earns interest for supplying the assets that borrowers want. Understanding that most crypto borrowing is collateralized — you post more value than you borrow — is the foundation for understanding how the safer parts of the system work.

• Crypto lending = earn yield by lending, or borrow against posted collateral
• CeFi: a company holds your deposit and lends it — you trust the company
• DeFi: a smart contract matches lenders/borrowers with on-chain collateral — you trust the code
• A common use is borrowing liquidity against holdings without selling them