From 2D Text to 4D Adaptation: The Web3 World Opened by Bitcoin The evolution of the Internet is like an expanding universe. From the original simple information display platform, it has gradually evolved into a digital world full of interaction and multimedia. If we compare the development of the Web to the expansion of dimensional space, then Web1 can be seen as a two-dimensional world of text, with one-way flow of information and limited interactivity. With the integration of rich media such as images and videos, Web2 has jumped to three-dimensional space, allowing users to consume and create content in a more diverse way, and social networks have flourished. Now, we are standing at the entrance to a whole new dimension - Web3. Some argue that Web3 is a 'four-dimensional adaptive world', and its core lies in a fundamental change in the way trust is generated. The trust products of Web3 are no longer static information endorsed by centralized institutions, but "living, real, and dynamic products" that operate and evolve autonomously through decentralized mechanisms. And it is Bitcoin that opens this door. The cornerstone of an adaptive world: the complexity of asymmetric interactions emerging The underlying logic of Web3's adaptive world can be summarized as the nonlinear adaptive complexity arising from asymmetric interactions under the assumption of P!=NP. This means that the operation of the system relies on the asymmetry between fast validation and difficult solving, and complex behaviors and values emerge through the interaction of participants. Taking Bitcoin as an example, its value is not generated by any centralized authority, but by the emergence of its three major formal systems through asymmetric interactions: UTXO (Unspoken Transaction Output) is a decentralized identity system built on top of asymmetric cryptographic algorithms. Each UTXO is associated with a public key, which can only be controlled by users who possess the corresponding private key, forming the foundation for decentralized ownership and identity authentication. POW miner module for distributed solving: Miners compete for the accounting rights of new blocks by performing high difficulty Proof of Work (POW) calculations. This distributed solving process requires a huge investment of computing power. Unified and centralized distributed ledger blockchain structure: Blockchain is an open, transparent, and tamper proof distributed ledger that records all transaction history and UTXO status, providing a consistent data foundation for the entire system. The brilliance of Bitcoin lies in the asymmetric interaction between the UTXO account system and the blockchain structure, as well as the solution process of POW miners and the blockchain structure. Constructing an effective transaction (costing UTXO) is a distributed parallel solving process, but verifying its validity on the blockchain is efficient and feasible. The process of miners searching for a valid block hash is extremely difficult, but verifying the validity of a new block is relatively simple. UTXO interacts with the centralized blockchain through transactions, while distributed miners interact with the blockchain through blocks. This asymmetric interaction ensures the security of the system and the continuous emergence of value. The Future of Web3: An Adaptive World Based on UTXO Based on this adaptive complex system, Web3 has the potential to reconstruct every aspect of the Web2 world. A highly imaginative viewpoint is that Bitcoin's UTXO account system may replace traditional centralized account systems, such as Google's email account system. If UTXO can become a universal decentralized account system, future Web3 applications will no longer rely on account systems managed by centralized institutions, but can directly reuse the UTXO system to build various applications. Due to the fact that the account system is the most fundamental foundation for human survival applications, with a universal decentralized UTXO account system, we can learn from Satoshi Nakamoto's method of building Bitcoin payments (BTC transfer) through asymmetric interactions to design new products that solve various real-world problems. This indicates that we will build a decentralized adaptive Internet based on the current human-oriented Internet, which is the core vision of Web3. In this new Internet, trust is no longer dependent on centralized authority, but is generated and verified independently through decentralized protocols and mechanisms, which ultimately spawns various "live, real and dynamic products", profoundly changing our digital life and even the real world. Of course, building a universal Web3 application using the UTXO account system still faces many technical challenges, such as complex user data management, permission control, and compatibility with existing Internet infrastructure, but this does not hinder our vision of the potential future of Web3. As a pioneer of Web3, Bitcoin has demonstrated the powerful power of asymmetric interaction and decentralized trust, and the future Web3 world will shine even brighter on this foundation.