BlackRock ETF IBIT increases holdings of over 41000 bitcoins worth approximately $3.92 billion within two weeks According to data from Lookonchain, BlackRock's iShares Bitcoin Trust ETF has increased its holdings of 41452 bitcoins worth approximately $3.92 billion in the past two weeks. At present, its total holdings have reached 614639 bitcoins, with a total value of approximately $58.07 billion.