The US Bitcoin spot ETF market saw significant capital flows yesterday. According to Farside Investors data, BITB recorded a net inflow of $8.7 million, indicating sustained interest from investors in this product. Meanwhile, Grayscale GBTC experienced a net outflow of $9.6 million, which may reflect market concerns regarding its premium issues. However, Grayscale BTC Trust gained a net inflow of $4.1 million, suggesting that investors remain optimistic about Bitcoin's long-term prospects.