Coinbase has introduced its version of wrapped bitcoin, cbBTC, on the Ethereum and Base networks, allowing users to use bitcoin in DeFi applications.
cbBTC is supported by various DeFi services for trading, lending, and as collateral, with automatic conversion features for Coinbase users transferring bitcoin to or from these networks.
This launch follows Coinbase's hint at entering the wrapped bitcoin market and challenging the existing leader, BitGo's WBTC, with plans to foster a significant bitcoin economy on Base.

A tokenized version of bitcoin (BTC) offered by Coinbase (COIN) has gone live on the Ethereum and Base networks. The crypto exchange is entering a market whose biggest player is backed by over $8 billion worth of the asset.

The Coinbase Wrapped BTC (cbBTC) is an ERC-20 token backed on a 1:1 basis with bitcoin (BTC) held by Coinbase. Such wrapped tokens allow users to utilize bitcoin they already hold in new ways onchain, such as providing their bitcoin as liquidity to decentralized finance DeFi protocols, or using it as collateral to borrow other crypto assets.

Several DeFi services are expected to offer support for cbBTC from Thursday, Coinbase said, including exchanges Aerodrome and Curve, lending applications Aave, Sky Protocol, Compound, real-world assets provider Maple and cross-chain bridges such as deBridge, among others.

Bitcoin sent by Coinbase users from the exchange to specific addresses on Base or Ethereum will automatically be converted 1:1 to cbBTC. When users receive cbBTC in their Coinbase accounts, it will be converted 1:1 from cbBTC to BTC.

At launch, cbBTC will be available to Coinbase users in the U.S. (excluding New York State), U.K., EEA states, Singapore, Australia, and Brazil.

Justin Sun on cbBTC

The token comes weeks after Coinbase first teased an announcement amid controversy around BitGo’s wrapped bitcoin (WBTC) token - which leads the wrapped bitcoin category and is worth over $8 billion as of Thursday.

At the time, Jesse Pollak, who created Base, said the team planned to build a "massive bitcoin economy" on the network.

Tron founder Justin Sun, who partially controls an entity named BiT Global that now handles the custody for WBTC, used Thursday's announcement to post what he describes as drawbacks of the new Coinbase offering.

"#cbbtc lacks Proof of Reserve, no audits, and can freeze anyone's balance anytime," Sun wrote. "Essentially, it’s just 'trust me.'"

#cbbtc lacks Proof of Reserve, no audits, and can freeze anyone's balance anytime. Essentially, it’s just 'trust me.' Any U.S. government subpoena could seize all your BTC. There’s no better representation of central bank Bitcoin than this. It’s a dark day for BTC.
— H.E. Justin Sun🌞(hiring) (@justinsuntron) September 12, 2024

UPDATE (15:06 UTC): Adds details from post about cbBTC by Justin Sun on X.

Bitcoin Coinbase Wrapped Bitcoin Base

Shaurya Malwa

Shaurya is the Co-Leader of the CoinDesk tokens and data team in Asia with a focus on crypto derivatives, DeFi, market microstructure, and protocol analysis. Shaurya holds over $1,000 in BTC, ETH, SOL, AVAX, SUSHI, CRV, NEAR, YFI, YFII, SHIB, DOGE, USDT, USDC, BNB, MANA, MLN, LINK, XMR, ALGO, VET, CAKE, AAVE, COMP, ROOK, TRX, SNX, RUNE, FTM, ZIL, KSM, ENJ, CKB, JOE, GHST, PERP, BTRFLY, OHM, BANANA, ROME, BURGER, SPIRIT, and ORCA. He provides over $1,000 to liquidity pools on Compound, Curve, SushiSwap, PancakeSwap, BurgerSwap, Orca, AnySwap, SpiritSwap, Rook Protocol, Yearn Finance, Synthetix, Harvest, Redacted Cartel, OlympusDAO, Rome, Trader Joe, and SUN.