From a reader:

Let me join the chorus of people advising you that Iraqi dinar speculation is about the dumbest get-rich-quick scheme to come down the pike since those “pyramid” scams foisted on college freshmen. Each of those troopers that’s toting around a valise stuffed full of dinars is wasting time. Those bills are only as good as the government that backs them, and the Iraqi government is, umm, “fiscally unstable.”
It’s a nice idea, but I’ll eat my hat if a) any emergent Iraqi government bothers keeping scrip printed under U.S. oversight rather than printing its own currency as soon as it can, and b) any of those guys carrying around that cash make anywhere near the fortune they think they will. Inflation will likely destroy the first attempt at getting an Iraqi fisc under control, and even if it doesn’t, try finding a buyer for Iraqi dinars at a favorable rate—gentrification of D.C.’s Southeast sounds nice, but I don’t know a single person who’s actually bought a brownstone there.
Backing a currency in the most chaotic country in the most chaotic region in the world isn’t investment–it is, as CNN’s Walter Updegrave says, gambling.