BlackRock’s spot Bitcoin 
$78,262 exchange-traded fund (ETF), iShares Bitcoin Trust (IBIT), surpassed the threshold of 700,000 BTC on July 8, 2025, achieving an asset value of approximately $76 billion. Launched in January 2024 in the US, the fund reached this historic level by adding 1,510 BTC on July 7, to its previously amassed 698,919 BTC in just 18 months. According to Bloomberg and K33 data, IBIT ascended to third place in terms of revenue among BlackRock’s 1,197 ETFs, needing only $9 billion to become the highest revenue-generating ETF. This performance, as noted by NovaDius Wealth Management President Nate Geraci, signifies an “unbelievable” growth to 700,000 BTC in 18 months.
IBIT’s Remarkable Performance
According to SoSoValue data, IBIT surpassed Grayscale’s costly GBTC fund in asset size last year, thereby solidifying its leadership. Currently, it holds 56% of the total US-based spot Bitcoin ETF assets alone.
Even surpassing Strategy’s 597,325 BTC, IBIT contributes approximately 80% of the total daily trading volume of $2.9 billion, significantly influencing liquidity in the market. Its rapid ascent has placed almost 6% of the limited 21 million Bitcoin supply under institutional custody via ETFs. Analysts attribute the institutional demand shift to IBIT’s low-cost structure and the BlackRock brand.
On the other hand, Fidelity’s FBTC product also exceeded the 200,000 BTC threshold, dethroning GBTC from second place. Following GBTC’s transition to an ETF, its balance decreased from 619,220 BTC to 184,226 BTC, while a net outflow of $23.3 billion was balanced by over $50 billion of inflows into other funds. Consequently, the total money flowing into US spot Bitcoin ETFs surpassed $50 billion, establishing a consistent institutional base in the cryptocurrency market.
Continuous Fund Influx Into US Spot ETFs
According to CoinShares’ latest weekly report, US-based spot Bitcoin ETFs gathered $1.2 billion, despite closing for the Independence Day holiday, reaching a total of $52.9 billion in just three trading days. This latest wave of fund inflows primarily concentrated around BlackRock and Fidelity due to their low-commission structures. These inflows mitigate the pressure from continued GBTC outflows as fund managers position Bitcoin as digital gold amid regulatory clarity and increasing macroeconomic uncertainties.
Another reason for investor interest is that the ETF structure eliminates security and custody risks associated with cryptocurrency exchanges. This structure notably provides a balance in institutional portfolios, offering a return potential distinct from traditional asset classes. Analyst Vetle Lunde remarked, “IBIT’s continuous demand underscores the permanent bridge between traditional finance and the cryptocurrency world.” Experts caution that while total ETF assets may increase, the limited Bitcoin supply could exert long-term upward price pressure.
