Principles of Cryptocurrency Design. -1. Expansion is not based on a single account, which does not meet the minimum concurrent expansion unit and cannot achieve the best scalability. 1.1 The UTXO unlimited concurrency of Bitcoin is based on the implementation of the minimum expansion unit module. 1.2. Sui's Object model learned the concurrent logic of Bitcoin, but did not learn the decentralized logic of Bitcoin. -2. Decentralization cannot be achieved without consensus based on a single account. The reference point for POS consensus is not POW, but UTXO. POS allows coin holders to delegate security to verification nodes, and this proxy process centralizes the corresponding security rights belonging to each coin holder to the proxy. However, the decisions made by the agent may not necessarily align with the interests of each represented holder, leading to centralization at the agency level. The decentralization of Bitcoin comes from UTXO, as each holder belongs to their own agent and is not centralized to any agent. Based on this, in order for POS consensus to achieve decentralized security like Bitcoin, the first step is to expand the agent to every coin holder, rather than centralizing voting for centralized agents that do not align with the interests of each coin holder. Similarly, the reason why Defi is not insecure and reliable is that its security has been delegated to Defi's project developers. LP holders have delegated security to the Defi project developers, who can bypass the represented holders and harm their interests, just like POS agents. Verification nodes can bypass the consensus security of the voted decision chain. In short, if we want to create products with good scalability and decentralized security and reliability. So we must first return to the most fundamental unit of scalability and decentralized security, which is the account model representing the interests of every holder. Treating each account model as the fundamental unit of scalability results in the best concurrency. The infinite scalability brought by Bitcoin UTXO. Treating each account model as the most basic voting unit for security, without any proxy decision-making, can achieve the most decentralized security. Like Bitcoin's UTXO. The longest chain for Bitcoin's POW consensus decision is to prevent extreme double spending arbitration issues on Bitcoin. Instead of solving the problem of decentralization.