Bitcoin holders who need cash often face a simple choice: sell BTC or find another way. Borrowing against Bitcoin is that other way. It lets them keep price exposure while using the asset as collateral. The catch is that many lending apps do not run on Bitcoin. They run on Ethereum or other networks, where an app cannot directly control BTC on Bitcoin’s chain.
How wrapped Bitcoin works
A common fix is a custodial wrapper. A provider holds the Bitcoin and issues a token on another network. The token represents the deposit. When someone deposits BTC, the provider mints a matching token. When the token is redeemed, it is burned and the Bitcoin is released under the provider’s rules. Retail users often buy the token from someone else. That trade moves the wrapper without moving the Bitcoin into custody again. The wrapper should track one BTC, so it does not protect against a price drop. If it trades below its backing, traders can buy and redeem for BTC, which can narrow the gap. Delays or limits can weaken that process.
Competing wrappers
Coinbase, Circle, and WBTC offer different versions of the same idea. WBTC relies on merchants, which connect exchanges and institutions to minting and redemption. Ordinary users usually get WBTC through exchanges. Coinbase folds conversion into its existing account, letting eligible customers move between BTC and cbBTC on supported networks. Circle’s cirBTC targets institutions and links to its USDC services. It publishes reserve addresses and uses Chainlink to share backing data. The competition is about where each token is accepted and how easily it can be turned back into Bitcoin.
Risks after the loan starts
Once wrapped Bitcoin reaches a lending app, a smart contract can accept it as collateral and issue stablecoins. The borrower must post more value than they borrow. If Bitcoin falls too far, the app can liquidate the collateral. That creates the result the borrower wanted to avoid: losing BTC exposure without choosing to sell. Wrapping itself pays no interest. Any yield comes from lending the token or other activity, which adds risk. A reserve dashboard may show that Bitcoin exists. It does not prove that every holder can redeem it, or explain what happens if the provider fails. Holding the token in a personal wallet gives control of the token keys, not the Bitcoin keys.
For the owner who wants cash without selling, wrapping is a trade-off. It makes Bitcoin usable in apps that otherwise could not accept it, but it adds fees and reliance on custodians and software. The loan may begin with Bitcoin. What counts in the end is whether the holder can get that Bitcoin back.
