I just got a recommendation about this... after some research, you (if US citizen) are allowed to have IDN (Iraqi Dinari), which is currently exchanges to USD 0.84 = 1000 IDN.
sounds interesting?!
Just remember that the dinar was once worth around 3 USD. It just hit rock bottom due to the war. The U.S. has trillions of it and it miht be a plan to safe the country... Idk, I am not even american, but hey, why not risk 10 dollars.
I am not a financial advisor nor do I really know too much about it. I just got this information form a friend who has decent connections in the financial world.
Anyways, have a good day! Cheers