Today, let's discuss four major Bitcoin Layer 2 (L2) solutions: Merlin Chain, B² Network, BEVM, and BounceBit. Each enhances Bitcoin's scalability, transaction efficiency, and security through unique technological innovations. Merlin Chain uses zkEVM technology and ZK-Rollup to speed up transaction processing and enable seamless mapping between Bitcoin and Ethereum addresses, optimizing cross-chain interaction. It also employs smart contracts and decentralized oracles to ensure netw...