Since its inception in January 2024, BlackRock's Bitcoin spot ETF, IBIT, has amassed an asset under management (AUM) of $52 billion, resulting in annual management fee revenue of approximately $187.2 million. This notable achievement has surpassed the annual fee revenue generated by its S&P 500 ETF, IVV, despite IVV's substantial AUM of $624 billion. The lower fee rate of 0.03% for IVV explains why its annual fee revenue is slightly less than IBIT's. The higher fee rate for IBIT reflects the additional costs associated with the regulation and custody requirements of a Bitcoin ETF.