Anyone who is not mining the coins need to enter crypto world through fiat exchanges. So, IRS will always be on lookout. But the best way is to move your coins out of fiat exchange as soon as you buy them. From IRS perspective, that is a tax event. They can not track where you transferred and how you used it. If it is sitting in some exchange that does not touch USD, IRS can not do anything about it. It can be Bitshares or it can be Exodus.