When 850 000 bitcoins -half a billion dollars- disappear from Mt. Gox in Tokyo, its unconventional CEO, Mark Karpelès, is arrested. After a year, he's finally released for lack of evidence. Mark Karp..When 850 000 bitcoins -half a billion dollars- disappear from Mt. Gox in Tokyo, its unconventional CEO, Mark Karpelès, is arrested. After a year, he's finally released for lack of evidence. Mark Karpelès is now free and breaks its silence.详情