Wrapped Bitcoin is a token on Ethereum that is backed one-to-one by Bitcoin. After the introduction of DeFi on the Ethereum blockchain, Wrapped Bitcoin (WBTC) was created to let crypto users provide liquidity for Bitcoin on Ethereum and use Bitcoin in different decentralized applications. The total market value of WBTC is $11 billion in 2022.
When a merchant wants to have new WBTC tokens in exchange for BTC, he calls on the Wrapped Bitcoin smart contract and sends his BTC to a custodian. The custodian then triggers the smart contract to mint new WBTC and send it to the merchant. When the merchant wants his BTC back, he submits his WBTC to the custodian and gets his BTC. That WBTC is then burned.
WBTC only has a circulating supply, which is 176,348 at the moment.
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