Part 1: Clearly identifies that the vulnerability of DeFi/CeFi lies in the human-driven game of interests, rather than true decentralization. Part 2: Explains how Bitcoin uses technical mechanisms (UTXO, longest chain) to kick 'human' out of the center of the rules. Part 3: Uses the metaphor of the 'shortest hair' to illustrate how dynamic games achieve decentralized consensus. Part 4: Elevates the theme, pointing out that the ultimate path for cryptocurrency is shifting from 'organizational governance' to 'physical constraints.'