Circle has launched cirBTC, a token backed 1:1 by bitcoin on the Ethereum blockchain. The move lets traders use their bitcoin holdings in decentralized finance protocols — and positions Circle to challenge Coinbase for control of the wrapped bitcoin market.
How cirBTC works
Each cirBTC token is fully collateralized by an equivalent amount of bitcoin held in reserve. Built on Ethereum, the token can be used across DeFi lending platforms, liquidity pools and other protocols that accept ERC-20 assets. For bitcoin holders, that means earning yield or borrowing against their BTC without leaving the Ethereum ecosystem.
The wrapped bitcoin landscape
Wrapped bitcoin tokens let bitcoin holders interact with DeFi on other blockchains. Coinbase has long been a major player with its own wrapped product. Circle's entry directly challenges that position, bringing the infrastructure and trust of the company behind USDC to the bitcoin-backed token space. It's a direct shot at Coinbase's dominance in the market.
Bringing bitcoin into DeFi has been a persistent goal, but existing wrapped bitcoin options have faced questions around custody and centralization. Circle's reputation as a regulated stablecoin issuer could give cirBTC an edge in attracting institutional and retail users alike. Borrowing, lending, yield farming — cirBTC can be used wherever ERC-20 tokens are accepted, which opens up a lot of possibilities for BTC holders who want to stay on Ethereum.
Circle hasn't announced plans for additional blockchain support, but the launch signals the company's ambition to expand beyond stablecoins into asset-backed tokens more broadly. For now, cirBTC is live on Ethereum and ready for traders to use immediately.
