What changed
8 million on October 21, according to Farside Investors US spot Bitcoin ETFs attracted $524 Black Rock and Fidelity supplied most of the inflow, extending a three-session run of net buying
Why it matters
Regulatory risk around BTC can change volatility, liquidity, or sentiment. The concrete detail to watch is 8 million on October 21, according to Farside Investors
Trading lens
Use this as constructive context from newsbtc.com. Watch whether US spot Bitcoin ETFs attracted $524 confirms momentum, invalidates active bias, or changes timing.