BlackRock's IBIT spot bitcoin exchange-traded fund reached $10 billion in assets under management after just seven weeks of trading. The fund had its second-largest daily inflows on Thursday, adding $603.9 million, but this was offset by $598.9 million in outflows from Grayscale's GBTC. This milestone puts IBIT among the very few ETFs with over $10 billion in AUM, with Fidelity's FBTC also surpassing $6.3 billion in assets. Additionally, the newborn nine spot bitcoin ETFs, excluding Grayscale's GBTC fund, now have over 344,000 BTC in assets, totaling $21 billion.