Bankrupt cryptocurrency exchange Bittrex Inc received court permission Wednesday to borrow $7 million in bitcoin to fund the start of its Chapter 11 case. Seattle-based Bittrex filed for bankruptcy Monday, saying it intended to return customer funds and wind down its U.S. operations. The company's international affiliates will continue to operate crypto exchanges for customers outside of the U.S., but Bittrex said that the U.S. regulatory environment had become untenable after the SEC sued the company for allegedly running an unregistered securities exchange.