Recent data reveals a significant surge in investment for Bitcoin spot exchange-traded funds (ETFs). As per insights from SoSoValue, these funds saw a net inflow of $477 million on October 21, 2025, as the cryptocurrency market experienced heightened activity. BlackRock’s IBIT ETF led the inflows, recording a single-day net influx of $211 million. This brings its cumulative net inflow to a staggering $65.092 billion. The Ark Invest and 21Shares ETF, ARKB, followed closely with a net inflow of $163 million, bringing its total to $2.219 billion. With the latest update, the total net asset value of Bitcoin spot ETFs reached $151.578 billion. Furthermore, the net asset ratio, reflecting the market value compared to Bitcoin’s total market capitalization, stands at 6.86%. A cumulative historical inflow of $61.975 billion has also been recorded.