Lambda Finance is a decentralized finance (DeFi) protocol that provides a Bitcoin-based USD stablecoin solution, allowing Bitcoin holders to participate in DeFi opportunities while maintaining exposure to Bitcoin's long-term potential. With Lambda Finance, users can mint BTCUSD stablecoins using their Bitcoin holdings and redeem them at any time at a 1:1 ratio, leveraging their BTC as collateral for accessing the broader DeFi ecosystem.