Ah, but the fact that there are a handful of other countries doesn't change anything - he can be prosecuted in all and each of these countries for various parts of that scheme.
USA prosecuting him doesn't mean that other countries can't, it simply means that USA was a bit quicker to do so. For example, it's technically possible that he's acquitted in USA for the AML part, but immediately after that gets extradited to Japan for some charges regarding the MtGox hack.
USA prosecuting him doesn't mean that other countries can't, it simply means that USA was a bit quicker to do so. For example, it's technically possible that he's acquitted in USA for the AML part, but immediately after that gets extradited to Japan for some charges regarding the MtGox hack.