Well if there was any value at all to it I am sure the US government would at least try to ruin the coin. Anything to ruin ISIS most contries would try. If I had the power I would as well.
Obama has actually been very friendly towards ISIS. To the point where some might speculate that he wants them to prosper (he does share their religion). It was only recently that he even started airstrikes.
Not only that but it is very difficult to attack a network with any level of effect without first buying/holding some level of the coin, this would essentially force the US to buy ISIScoin which would help finance ISIS