(Reuters) – Mt. Gox, once the world’s largest bitcoin exchange, is “at a turning point,” CEO Mark Karpeles told Reuters in an email, as the trading website remained down on Tuesday after halting withdrawals earlier in February. In an emailed response to a question of whether the Tokyo-based exchange was dead, Karpeles said: “We should have an official announcement ready soon-ish. Six leading bitcoin exchanges distanced themselves from Mt. Gox in a statement, calling the exchange’s activities a “tragic violation of the trust of users of Mt. Gox.” (Reporting by Brett Wolf of the Compliance Complete service of Thomson Reuters Accelus;