According to Farside Investors, GBTC (Grayscale) recorded US$4.4 million in daily flow on Sep 8, 2025 (source: Farside Investors @FarsideUK on X; farside.co.uk/btc). Farside Investors adds that full datasets and disclaimers for U.S. Bitcoin ETF flows are available on its dashboard, enabling traders to reference the reported USD figures by fund for decision-making (source: farside.co.uk/btc).