You made a great point but it's the opposite of what you argue for. Duffel bags full of cash moved across borders are quite easy to spot, not to mention the num

You made a great point but it's the opposite of what you argue for. Duffel bags full of cash moved across borders are quite easy to spot, not to mention the numbers of people transporting them (along the way stealing some or cooperating with law). That's why dictators don't like duffel bags of cash and really like cryptocurrency.