Coinbase's recent innovation could transform Bitcoin from digital gold into a powerful DeFi asset, unlocking billions in untapped potential. Although Bitcoin (BTC 0.29%) remains the most valuable cryptocurrency in the world, it lacks much of the functionality other cryptocurrencies possess today, particularly smart contract capabilities. Without smart contracts, Bitcoin holders are unable to directly participate in the rapidly growing decentralized finance (DeFi) economy, where users engage in lending, borr ...