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Function FBTC is a project that transforms Bitcoin into a liquid, composable and productive reserve asset for DeFi, extending Bitcoin's utility beyond holding. It lists vaults for lending and yield, including Cian and Sentora vaults on Ethereum and Solana, with assets such as FBTC, stablecoins and PYUSD. The project also describes serving institutional investors, DeFi protocols, market makers and Bitcoin holders.