The currency revaluation is going to work like a reverse stock split and come with the issuance of new bank notes. If you have a 1000 old dinars and they revalue, your old 1000 dinar not will be worth 1 new iraqi dollar. This could have certain serious implications for debt issued with specific covenants, but its not something that you or I can profit from.
The people who shill for this are either making money brokering "dinar exchange investments" or getting paid to advertise it for someone who is.
Its a scam, buy gold if you don't like fiat, don't speculate on the dinar, you will get burned.