Bitcoin spot ETFs experienced a net outflow of $5,282.70 million on September 18! 📉 This was the first outflow after 4 days of net inflows. Grayscale GBTC saw an outflow of $813.47 million, while Grayscale Bitcoin Mini Trust ETF BTC saw an inflow of $266.34 million. The total asset value of Bitcoin spot ETFs is currently $548.46 billion, accounting for 4.61% of Bitcoin's total market value. 🚀