Trading currency is similar to messing around with stocks, in the likes that they are both risky, but both could pay off in the end if they are done right. For some time, between 1971 and 1973, the Iraqi dinar was equal to 3.21 dollars in American Currency. This was a time when the U.S. dollar was obviously worth much more, but today, that sadly has changed.
Although the highest dinar denomination of 250 note, was not printed until 2002, it was still better to buy Iraqi dinars to dollar, yet people still buy foreign currency of Iraq today. If you follow anything about trading currency, you may have seen on the internet that investors are saying there is still a time to trade this money back in and get good money back.
If you do have any dinar, it might be a good time to trade it in because, although investors have been accumulating the new Iraqi Dinar since it was introduced in 2003, it is slowly becoming equal with other currencies. But in 2010, the Central Bank of Iraq announced that they planned to redinominate the currency to ease cash transactions.