Any transaction that involves dollars involves American banks due to correspondent banking. That means there's jurisdiction in the EDNY or SDNY because that's

Any transaction that involves dollars involves American banks due to correspondent banking. That means there's jurisdiction in the EDNY or SDNY because that's where all the banks are. America also has jurisdiction over its citizens conduct. It may not be the SEC or even a securities fraud prosecution but if the government can find emails or logs that show intent or show that he was sending money to Alameda and trying to evade internal compliance controls he can be found guilty of wire fraud. The fact that he owns most of Alameda doesn't help him either.