Bitcoin spot ETFs recorded $6.2137 million in net inflows during the Sept. 14-18 trading week in the U.S. Blackrock's IBIT led with $121 million in weekly inflows, taking its cumulative total to $64.120 billion. Fidelity's FBTC ranked second with $79.9348 million, bringing its historical net inflows to $10.360 billion, according to SoSoValue data reported by PANews.