Century-long, embezzlement or culmination of a series of neglect, the disappearance of 650,000 bitcoins continues to be a mystery.

The story had started badly. When he bought Mtgox in February 2011, Mark Karpel was notified by the seller, Jed McCaleb, that he was already missing 80,000 bitcoins. The main stock exchange where to buy and sell bitcoins would run after those missing "chips" for years, without ever finding them. Worse, the mass of missing bitcoins on the call would grow and reach the astronomical figure of 850,000 at the time of bankruptcy in 2014, a figure reduced to 650,000. Mark Karpelès, "The Wolf of Bitcoin Street", is currently on trial for embezzlement. He was ambitious however to "clean the planet bitcoin"