Wu said he learned that Assistant U.S. Attorney Nathan Rehn had accused SBF of "liing to the world" when building his cryptocurrency empire, FTX, and that only his friends and girlfriend knew the truth, according to Bloomberg. Before the company went bankrupt a year ago, SBF used investor deposits from FTX as a personal bank account, and only SBF’s coterie knew he was using clients’ money to fund his lifestyle.