Trading time 5.19US Treasury yields rise, market risk appetite decreases, Bitcoin surges and falls back Keywords: BTC, ETH Credit rating agency Moody's has downgraded the US government's credit rating from the highest level of Aaa to Aa1, mainly due to the continuous rise of national debt. The rise in US bond yields may affect market risk appetite. Institutions have increased their long-term confidence in Bitcoin, and JPMorgan analysts believe that Bitcoin will continue to outperform gold in the second half of the year. Ethereum surged and fell, causing a setback for the high leverage operations of the giant whale. The liquidity crisis of counterfeit currencies is intensifying. The market share of Bitcoin has rebounded to 53%, and the seasonal index of altcoins has dropped to 24, indicating a significant fund siphon effect.