Digital Currency Group, the battered crypto conglomerate run by Barry Silbert, named financial services veteran Mark Shifke as chief financial officer. Shifke has almost four decades of experience in finance and most recently served as CFO at Billtrust, DCG said in a statement Monday. He also served as CFO at mobile banking and prepaid debit-card provider Green Dot, and worked at JPMorgan Chase & Co. and Goldman Sachs Group Inc. Former CFO Michael Kraines left in April after more than two years.