What changed
Fidelity's FBTC and Grayscale's GBTC saw outflows of $83 Bitcoin ETFs just saw their biggest day in a month thanks entirely to Black Rock
Why it matters
Regulatory risk around BTC can change volatility, liquidity, or sentiment. The concrete detail to watch is fidelity's FBTC and Grayscale's GBTC saw outflows of $83
Trading lens
Use this as watchful context from coindesk.com. Watch whether bitcoin ETFs just saw their biggest day in a month thanks entirely to Black Rock confirms momentum, invalidates active bias, or changes timing.