Investors pulled $333 million from BlackRock's iShares Bitcoin Trust ETF (IBIT) on Thursday, the largest day of net outflows since the fund's launch. In addition, the fund also suffered three consecutive days of net outflows, the longest-running net outflow. The largest spot bitcoin fund, the iShares Bitcoin Trust ETF has more than $53 billion in assets and nearly $37 billion in inflows. Since its launch in January, the iShares Bitcoin Trust ETF has been hugely popular with institutional investors, and this enthusiasm has also pushed bitcoin to a record high of $108,315 in mid-December.