[1] is a claim by some guy without any proof. In addition, the guy is clearly interested in selling his security services.
As for [2], [3]: I don't think there's any special law about people who use US dollars being under US jurisdiction.
As for [2], [3]: I don't think there's any special law about people who use US dollars being under US jurisdiction.
If it's true, I'd avoid USD like plague
Because the USD is the international reserve currency for a lot of countries and the US largely is pretty stable, most countries are fine with cooperating in cases like this with notable exceptions.
FWIW that's changing under Trump (i.e. people are seeing the US as less stable), and the EU is making efforts to increase the use of the Euro as an international reserve currency.
https://www.rt.com/business/443354-iran-south-korea-currenci...