U.S. spot Bitcoin (CRYPTO: BTC) ETFs pulled in $730.9 million Thursday, the largest single-day haul since Jan. 14 as Bitcoin tapped $82,000. BlackRock Leads Biggest Bitcoin ETF Inflow Since January According to SoSoValue data, BlackRock's iShares Bitcoin Trust (NASDAQ:IBIT) led with $454 million, accounting for roughly 62% of the total, followed by ARK Invest and 21Shares' ARKB (CBOE: ARKB) with $137.7 million and Fidelity's FBTC (CBOE: FBTC) with $74.4 million.