They've been using BTC for some time to raise funding for the terrorist activities.
They've also started selling antique and historical pieces from museums that they claim 'doesn't represent Islam' and whatnot.
Wow. Do you have the links to where we will find that? Sounds interesting.
Yes please do provide a link because i do not believe it these guys take over banks and oil fields what do they need with bitcoin? The price is far to low for them to have been in it. What i think you are confused with is scammers pretending to be them and taking coin from the fools that is the thing with fools they will be parted with their money unfortunately.
There are quite a few articles. A simple search online will bring you quite a few sources. Here are just a few.