BlackRock’s iShares Bitcoin Trust (IBIT) is now generating more revenue than its flagship S&P 500 ETF (IVV), bringing in an estimated $187.2 million annually despite having only $52 billion in assets under management compared to IVV's $624 billion. The higher fee structure of IBIT, at 0.25%, contrasts with IVV's 0.03%, reflecting the growing demand for regulated bitcoin investment products.