I haven't seen much on Twitter lately, but I just took a look and found that everyone is discussing the valuation of Ethemum. In this way, I provide a perspective: The prevailing forecast now is that stablecoin issuance will reach $3 trillion by 2030. Consider how many of them will run on Ethereum or settle on Ethereum? According to the principle of POS, if you control 51% of your stake, you can take all these stablecoins for yourself. So theoretically, if you spend half of Ethereum's market capitalization to buy enough ETH, conduct a 51% attack, and then earn enough stablecoins to pay for itself, then this is a worthwhile thing to do. Conversely, Ethereum's market capitalization must be at least twice the market capitalization of all stablecoins on it to be secure enough. Currently, USDT is issued on Ethereum with about $78 billion and USDC with $42 billion, which together is $120 billion, accounting for 46% of the total market value of stablecoins. If this percentage drops to 33% in the future, the issuance of stablecoins on Ethereum should reach $1 trillion by 2030. At that time, Ethereum's market capitalization should be at least $2 trillion to ensure the security of the network. Maybe someone has said it a long time ago, so let's think of it as a pick-up of people's teeth.