David Knox, former head of capital markets at PayPal Holdings Inc., has been appointed Chief Financial Officer of Hyperion DeFi Inc., a digital asset treasury firm. Knox, who spent approximately 18 months at PayPal, also held roles as head of credit and financial services finance. His previous experience includes positions at SoFi Technologies Inc. and Cantor Fitzgerald. Knox expressed enthusiasm for joining Hyperion DeFi, citing the opportunity to be at the forefront of financial innovation. Hyperion DeFi, formerly known as Eyenovia, rebranded in July following the launch of its digital asset treasury strategy.