Odaily Planet Daily News Lookonchain monitored the US spot Bitcoin ETF data on May 30th and showed: 1. Grayscale GBTC reduced its holdings of 1,550 bitcoins, worth approximately US$105.8 million; 2. Grayscale currently holds a total of 287,443 bitcoins, worth approximately US$19.6 billion; 3. BlackRock increased its holdings of 364 bitcoins, worth approximately US$24.86 million, and currently holds a total of 289,035 bitcoins, worth approximately US$19.72 billion; 4. 9 Bitcoin ETFs reduced their holdings by a total of 667 bitcoins, worth approximately US$45.5 million.