Bitcoin's integration into decentralized finance (DeFi) is gaining momentum with several technological advancements and ecosystem developments. Bitcoin, with a market cap exceeding $2 trillion, has a significantly smaller total value locked (TVL) in DeFi compared to Ethereum's $100 billion+. The Nakamoto upgrade on Stacks is enabling 120x faster transactions and adding smart contract functionality to Bitcoin's ecosystem, addressing its scalability and transaction cost limitations. Additionally, the development of a trustless Layer 2 (L2) bridge between Starknet and Bitcoin by sCryptplatform aims to enhance interoperability. PortaltoBitcoin has introduced BitScaler, a bridgeless, non-custodial solution designed to scale Bitcoin's DeFi capabilities. These advancements are expected to attract more developers and users to Bitcoin's DeFi ecosystem, leveraging its liquidity and expanding its use cases.