AI Today:
1. Federal Reserve Chair Powell signals hawkish stance, causing a sharp decline in the crypto market
2. Chinese central bank takes strong action, multiple departments jointly crack down on virtual currency trading and speculation
3. Japan plans to impose separate taxes on cryptocurrency trading income, with the tax rate possibly reduced to 20%
4. Ethereum network undergoes major upgrade, with new features like account abstraction fully launched
5. Sony Bank plans to issue a USD-pegged stablecoin, expanding into crypto payment scenarios