According to @FarsideUK, Grayscale’s US Bitcoin ETF (GBTC) recorded a daily net flow of 17.9 million US dollars on Jan 5, 2026; source: @FarsideUK and Farside Investors farside.co.uk/btc. Farside Investors’ Bitcoin ETF flow tracker lists the 17.9 million figure specifically under BTC (Grayscale) as the daily net flow in USD for that date, providing the referenced dataset for trading flow monitoring; source: Farside Investors farside.co.uk/btc.