This article explores the economic models of Bitcoin and major PoS blockchains. First, it analyzes the concept of Bitcoin's "shutdown price" and its calculation method, involving Bitcoin's total supply, mining mechanism, and miner revenue. Then it compares the economic models of PoS blockchains like Ethereum and Solana, including their token distribution, inflation design, staking mechanisms, and liquid staking. The article concludes by summarizing the advantages of PoS over PoW and highlighting that economic models are crucial for the long-term operation of blockchains.