BlackRock Spot Bitcoin ETF Becomes the Fastest Fund to Break $70 Billion in Size, Breaking Gold's Previous Record According to The Block, Bloomberg ETF analyst Eric Balchunas stated that BlackRock's Bitcoin ETF, IBIT Fund (the largest of its kind), surpassed $70 billion in asset size in just 341 trading days, becoming the fastest ETF to reach this milestone, five times faster than the previous record holder GLD (1691 days). GLD, also known as SPDR Gold Trust Fund, was listed on the New York Stock Exchange in November 2004. It is the world's largest physically backed gold ETF with assets under management of approximately $100 billion. BlackRock launched its spot Bitcoin ETF in January 2024. According to Arkham Intelligence data, in April of this year, BlackRock's funds held 2.8% of the total supply of Bitcoin. The asset management company holds Bitcoin on behalf of its clients, but does not own the cryptocurrency itself.