US Bitcoin spot ETFs experienced a significant net outflow of $278 million (approximately 408.4 billion KRW) on the 12th, according to TraderT. This reverses a brief period of net inflow observed just the day before. BlackRock's IBIT saw $36.91 million exit, while Fidelity's FBTC experienced a larger outflow of $132.86 million. Ark Invest's ARKB also saw $85.18 million leave the fund, and Grayscale's GBTC recorded an outflow of $23.05 million. Notably, no Bitcoin spot ETFs reported net inflows on this particular day. The reasons behind this sudden shift in investor sentiment are varied and could be attributed to profit-taking, macroeconomic concerns, or alternative investment opportunities. This outflow highlights the volatile nature of the cryptocurrency market and the sensitivity of ETF flows to market conditions. ```