Last night, I stared blankly at the rain outside the window, and time passed so quickly. Recently, I noticed @build_on_bob, which made me rethink the possibilities of Bitcoin in DeFi. All along, BTC has been unquestionable as a store of value, but in the DeFi ecosystem, it always seems to be separated by a layer. Either it relies on those wrapped IOU tokens, which always have some trust issues, or you have to deal with those complex cross-chain operations, which are indeed not user-friendly for most people. BOB seems to offer a different path, allowing BTC to "move" on its own, in a native way. Its core is quite clear. BOB invites Bitcoin from the "audience" of the DeFi ecosystem to the center of the "stage," making it a real underlying driving force and cornerstone of liquidity. What particularly attracts me is its native support capability. Under the BOB framework, developers can directly use Bitcoin to write smart contracts, build DEXs, lending protocols, and even NFT markets. For those of us holding Bitcoin, the operational aspect becomes much easier. There's no need to delve into the mechanisms of various cross-chain bridges, constantly calculate Gas costs, or worry about the risks of private key migration. Using a familiar Bitcoin wallet and keeping that set of addresses allows for a smoother participation in various DeFi applications. In the @build_on_bob system, it seems like Bitcoin no longer has to choose between "storing it absolutely safely" and "earning efficiently." It retains its purity as digital gold while being able to flow and create value flexibly like a native DeFi token. This kind of integration is worth savoring.