#ETH突破2500 Bitcoin: The First Practical Artificial Complex Adaptive System. The core features of Complex Adaptive Systems (CAS) lie in the autonomy of their components, the nonlinearity of their interactions, and the complex behaviors that emerge from the system as a whole. The Bitcoin network is such a system: countless independent nodes (miners and users) interact based on predefined protocols, and their behaviors such as transaction validation, block generation, and consensus are not controlled by a centralized authority, but are instead achieved through a distributed, dynamically adjusted mechanism of self-organization. Features such as Bitcoin's difficulty adjustment mechanism and the fluctuation of transaction fees during network congestion all reflect its inherent adaptability, enabling it to maintain operation in a constantly changing environment. Therefore, Bitcoin can be seen as the first successfully practical artificial complex adaptive system, providing a valuable practical example for building similar systems in the future.