Bitcoin spot ETFs are really hot right now. It seems that $1.1 billion has flowed in over the past three days. In the United States, ETFs are essentially a way for institutional investors and individuals to easily hold Bitcoin, similar to traditional investment trusts, without the hassle of managing wallets directly. Looking at the past six weeks, this week appears to have the largest inflow. Since the approval of U.S. ETFs, the continued influx of institutional money suggests that a sense of systemic trust is developing. The overall bullish market sentiment also seems to be influencing this trend.