Cryptocurrency custodian Copper Technologies Ltd. has hired former Goldman Sachs Group managing director Amar Kuchinad to replace Dmitry Tokarev as group CEO, as the company looks to acquire more traditional financial firms as customers and break into the U.S. market. Copper said in a statement on Monday that Tokarev, who founded Copper in 2018, will serve as a founding director on the company's board, which is led by Philip Hammond, the former UK chancellor of the exchequer.