It is widely known that Ethereum's Layer 2 technology is currently the most successful Layer 2 solution. Compared to the scaling solutions of Polkadot and Cosmos, Layer 2 technology not only effectively inherits the security of Layer 1 but also allows for truly permissionless access to building Layer 2. As the pioneer of the blockchain ecosystem, Bitcoin's scalability has long been criticized, seriously impacting the development of its ecosystem.What are the current Layer2 projects ...