Being limited to reading the first paragraph of the linked article (paywall) and the other comments here, I can't resist to point out for those Pratchett fans a

Being limited to reading the first paragraph of the linked article (paywall) and the other comments here, I can't resist to point out for those Pratchett fans among us, that this feels like the stunt Moist von Lipwig pulled in "Going Postal" in order to pay for the reconstruction of the post office. While I feel really bad for those who lost money with MtGox, there were so many signs pointing at such an outcome: Unexperienced programmer asking all the wrong questions, background in "Magic the Gathering" card trading, zero background in banking or security. None of that sounded particularly trustworthy and look where it went.