In the past week, over 600 companies have disclosed substantial investments in spot Bitcoin exchange-traded funds (ETFs) through their 13F filings with the United States Securities and Exchange Commission (SEC). These filings reveal that professional investment firms hold $3.5 billion worth of Bitcoin ETFs. Notable investors include Morgan Stanley, JPMorgan, Wells Fargo, UBS, BNP Paribas, the Royal Bank of Canada, and hedge funds such as Millennium Management and Schonfeld Strategic Advisors. Millennium Management is the largest investor in Bitcoin ETFs, with $1.9 billion allocated. This includes $844.2 million in BlackRock’s iShares Bitcoin Trust (IBIT), $806.7 million in Fidelity’s Wise Origin