The Future of Cryptocurrency: Going Far Beyond Blockchain to Focus on Complex Adaptive Systems Current discussions about the future of cryptocurrencies tend to focus on blockchain technology. However, we believe that the real future lies in complex adaptive systems (CAS), where blockchain only solves the liquidity problem and whose core value lies in providing a transparent "trust code". Bitcoin is not just a blockchain application, but an innovative example of CAS in the digital world, and its internal mechanism indicates the future direction of cryptocurrency. Blockchain technology improves the liquidity of digital assets through distributed ledgers and consensus mechanisms, and builds a trust mechanism with transparency. Public chains such as BSC and TRON are typical applications of their liquidity solutions. However, blockchain is essentially a centralized trust transfer, which is difficult to directly map individual rights and perceive complex realities. Bitcoin's uniqueness lies in its emergence as an emerging CAS, which consists of three key parts: UTXO, P/NP asymmetric perception reality, and consensus ledger. The UTXO model realizes the direct mapping of digital assets and individual rights, and truly embodies individual sovereignty. Specifically, PoW miners perform complex distributed calculations in the network to find the Nonce value that satisfies the difficulty target (NP problem), which is a computationally intensive process that consumes a lot of electrical energy. Nodes in a consensus ledger network simply verify that the Nonce submitted by the miner is valid and that the transaction is correctly signed (P problem), a verification process that can be done in polynomial time. This computational asymmetry enables the Bitcoin network to perceive and confirm the transaction behavior that occurs in the real world in a unique way, behind which is the injection of real power energy into the distributed network, forming a closed loop of energy conservation through energy consumption and verification, ensuring the immutability of transactions and the anchoring of value. The consensus ledger serves as a centralized notarization of trust code, recording and verifying transactions to achieve liquidity and transparency. Therefore, emerging fields such as DePIN (Decentralized Physical Infrastructure Network), DID (Decentralized Identity) and GameFi should actively explore the direction of CAS implementation. They need to learn from Bitcoin's innovations in UTXO mapping of individual sovereignty, P/NP asymmetric perception of reality, and consensus ledger construction trust, so as to build a human-machine symbiosis system that can perceive a wider range of real-world information and more directly protect individual rights. Only in this way can cryptocurrencies break through the existing framework of DeFi and truly penetrate into all aspects of the real economy and digital life, creating more diverse and valuable application scenarios. Blockchain is an integral part of CAS, but the future of CAS-based cryptocurrencies is much bigger.