Time and Bitcoin: -The source of trust for Bitcoin is time. -The driving force behind Bitcoin is time. The design theory of Bitcoin is based on Turing's paper "Systems Based on Ordinal Logic". The idea of super poor iteration in Turing's ordinal logic relies on time. This time is a perception in the human mind, corresponding to the thermodynamic diffusion phenomenon of the physical rational world. The first thing Satoshi Nakamoto did in designing the Bitcoin system was to design a The hash collision algorithm for simulating thermodynamic diffusion motion is used to capture relative time, that is, to establish an decentralized time server. Then, let the total amount of 21 million BTC based on time be halved in 32 cycles as the driving force for the entire Bitcoin system. The design specification of the entire Bitcoin system is based on the only undecidable self referential problem, which is the existence problem of TX/Block itself. This problem is referred to by Satoshi as the double spending problem, which is how to achieve decentralized trust. Satoshi Nakamoto's use of Turing's ordinal logic relies on the time stamp sequence constructed in the system for the idea of super poor iteration. So, it can be simply said that Bitcoin trusts time.