Odaily Planet Daily News Lookonchain monitored the US spot Bitcoin ETF data on May 22, showing: 1. Grayscale GBTC increased its holdings of 122 bitcoins, worth approximately US$8.5 million; 2. Grayscale currently holds a total of 289,512 bitcoins, worth approximately US$20.27 billion; 3. BlackRock increased its holdings by 4,168 bitcoins, worth approximately US$292 million, and currently holds a total of 281,884 bitcoins, worth approximately US$19.74 billion; 4. 9 Bitcoin ETFs increased their holdings by a total of 3,967 bitcoins, worth approximately US$277.76 million.