Odaily Planet Daily News Lookonchain monitored the US spot Bitcoin ETF data on May 31, showing: 1. Fidelity increased its holdings by 1,727 bitcoins, worth approximately US$116 million, and currently holds 164,030 bitcoins, worth approximately US$11 billion; 2. Ark 21Shares reduced its holdings by 1,449 bitcoins, worth approximately US$97.44 million, and currently holds 47,175 bitcoins, worth approximately US$3.17 billion; 3. The 9 Bitcoin ETFs increased their holdings by a total of 458 bitcoins, worth approximately US$30.8 million.