I look at it this way, ISIS knows it is toast in Mosul, and since the US supports ISIS, and "we" know the RV is coming, what a "sweet" way to make sure ISIS gets the benefit.
October 10, 2016
ISIS forces people of Mosul to use its currency, confiscates Iraqi Dinars
Nineveh – Iraqi media outlets reported on Monday that the Islamic State prohibited Iraqi Dinar currency from Mosul in order compel its people to adopt ISIS currency.
Al Sumaria News stated, “ISIS confiscated large quantities of the Iraqi Dinar currency from the people of Mosul, forcing them to exchange it with ISIS currency. ISIS gave the residents receipts with the amounts taken from them.”
“The so-called ISIS Sharia Court issued a fatwa prohibiting the Iraqi Dinar currency in markets in the city of Mosul,” Al Sumaria added.
The coffers of ISIS were adversely affected after Iraqi security forces liberated many areas and cities in Iraq.