BlockFills, a cryptocurrency financial services firm, has announced the resignation of its co-founder and CEO, Nicholas Hammer. Joseph Perry has been appointed as the interim CEO. The leadership change comes after the company reported a $75 million loss, leading to the suspension of customer deposits and withdrawals on February 11. Prior to the freeze, BlockFills advised some clients to withdraw their assets. The company is currently seeking potential buyers while deposits remain halted. BlockFills' investors include Susquehanna Private Equity Investments, CME Ventures, and Simplex Ventures.