According to CoinMeta, coinspectator stated that the currency of AI's economy is a cryptocurrency. Currently, AI agents have begun to trade autonomously, with a daily trading volume of nearly 205 million transactions and a transaction amount exceeding 53 million US dollars. The article points out that AI does not support the use of credit cards, CVV, waiting for SMS verification codes, or dealing with bank business hours. Therefore, if agents need to make automatic payments for calculations, data, API, or other services, they require a currency that is similar to that used by the software, featuring instant, global, programmable, and 24/7 availability. Stablecoins are particularly suitable for small transactions between machines, without the need for manual approval for each transaction. The article suggests that in the future, when millions of agents conduct thousands of small transactions per second, a completely different payment system may be required.