Exchange-traded funds holding Bitcoin have accumulated over $100 billion in assets, marking a watershed moment for cryptocurrency adoption by mainstream investors.

BlackRock's iShares Bitcoin Trust has emerged as the dominant player with $45 billion in assets, making it one of the most successful ETF launches in history. Fidelity, Grayscale, and other issuers have also attracted tens of billions in investment.

Bitcoin's price has responded accordingly, trading above $150,000, up from roughly $45,000 when ETFs launched.