Go pull out the Don Johnson episode from ten years ago in Bavaria. Similar type situation. Don got caught big-time with several billion in notes. There were alot of questions and I think he had to finger a number of big-names in California who were using him (and a number of entertainers) as transport vehicles back and forth to Switzerland.
Its amusing how this paper note business works. You merely swap property or items of value for the notes, and then hide them in vaults of countries way out of sight. You take bribes and settle disputes with “invisible money”.
My initial hunch like a poster above was that North Korea might be involved.