Cardano's Charles Hoskinson predicts that decentralized finance (DeFi) will come to Bitcoin and surpass Ethereum and Solana.Cardano and Bitcoin have agreed to use smart contract features in the Bitcoin ecosystem, paving the way for DeFi projects on Bitcoin.Hoskinson plans to train BTC developers on Aiken, a programming toolkit for smart contracts on Cardano.Hoskinson's previous criticism of Bitcoin has shifted after the collaboration between Cardano's EMURGO and Bitcoin.