BlackRock and Fidelity have seen a significant increase in total ETF inflows this year, with a notable contribution from their Bitcoin exchange-traded funds (ETFs). Specifically, BlackRock’s Bitcoin ETFs have accounted for 26% of the year-to-date inflows for the company, while Fidelity’s Bitcoin ETFs have contributed to 56% of their total ETF inflows. BlackRock’s iShares Bitcoin…