Recent movements in the Bitcoin ecosystem have been extraordinary. We're hearing new Bitcoin ecosystem-related news almost daily. Just organizing the news that occurred this year alone yields the following: [BTCFi] - @SuiNetwork partnered with major BTCFi projects and introduced @Stacks' sBTC to their ecosystem. - @Tether_to onboarded to the Lightning Network. - @fragmetric launched fragBTC, expanding BTCFi into the Solana DeFi ecosystem. - @SolvProtocol launched institutional-grade RWA products utilizing Blackrock BUIDL and Hamilton Land SCOPE. [Bitcoin Core] - The data size limit for the OP_RETURN, which allows arbitrary data to be stored in Bitcoin transactions, has been removed. [BTC L2] - @BitlayerLabs successfully executed a BitVM bridge challenge game on the Bitcoin mainnet. - The BitVM Alliance announced BitVM3, which improves SNARK verification efficiency by approximately 1000x. [zkVM] - @RiscZero was integrated into Bitcoin ZK rollup @citrea_xyz. - @SuccinctLabs introduced zkVM to Bitcoin ecosystem projects like @babylonlabs_io and @nubit_org through SP1. As shown, the Bitcoin ecosystem has been expanding at a very rapid pace since the first half of this year, and numerous additional Bitcoin Layer 2 chains and BTCFi projects are expected to emerge in the short term. Anticipating a rapid information gap, I've written this article to provide the comprehensive overview of the Bitcoin ecosystem's development process and current trends. I hope this article will help with understanding the Bitcoin ecosystem going forward!