Grayscale's spot Bitcoin ETF experienced significant market activity, recording a record daily outflow of $643 million on March 18, marking the largest single-day outflow since its conversion to a spot ETF on January 11. This event contributed to a total net outflow of $154 million from Bitcoin spot ETFs on the same day, the first net outflow in 11 trading days. Despite these outflows, Grayscale CEO Michael Sonnenshein announced plans to reduce the fees of its Bitcoin ETF over time, in response to the fund experiencing more than $12 billion in outflows since its conversion. This move comes as the digital asset investment products sector witnessed record weekly inflows, with Bitcoin ETFs alone pulling in $2.56 billion last week, the highest since their launch.