Bitcoin has always been on the periphery of the DeFi ecosystem, and many are curious about the reasons behind this. Upon closer inspection, the core issue actually lies in the lack of true cross-chain interoperability. Now, there are projects addressing this pain point—by enabling Bitcoin to directly connect to mainstream public chains, DeFi protocols, and liquidity pools. This changes the inefficient situation where Bitcoin is often wrapped into tokens, allowing BTC liquidity to truly integrate into the entire Web3 ecosystem. This breakthrough in interoperability could redefine Bitcoin's role in decentralized finance.