This isn't really a question that can be answered, it would be pure speculation if anyone answered when will the Iraqi Dinar go up. It already has gone up. Had you bought your Iraqi Dinar back in say 2004 and still held it today it's up a few hundred bucks per million from where you bought it at.
Heck even recently the dinar has gone up a few points here and there over the past year or two. I'm not sure if your talking about the Dinar slowly increasing in value or if you're hoping for an "rv" or "revalue" as many people call it where they speculate there would be an overnight pop in value and it would jump from costing say $1000 per million dinar to the point where a million dinar is say 12 million dollars.
I personally think that's ridiculous, it sounds too good to be true, it doesn't make sense, and it's never before happened in history.