Cardano's Charles Hoskinson believes a Bitcoin ETF offering DeFi yields will drive institutional interest in Bitcoin-based financial instruments.Cardano plans to bridge Hydra, its scaling solution, with the Bitcoin Lightning Network to improve transaction efficiency and interoperability.Cardano's Aiken programming language will simplify cross-chain operations by enabling scripting of both Bitcoin and Cardano.Cardano's collaboration with Maestro aims to provide a seamless user experience for engaging in DeFi transactions in the Bitcoin space.