Sure, you're not going to completely squash it but it will then be considered a "dirty" service and only be used for illegal activities. No U.S. business will ever touch it again.
The recent shutdown of Liberty Reserve, another digital currency favored by criminals, shows the extent to which the U.S authorities are willing to go in cases like this. Nowhere on earth is safe if you are running/facilitating a multi-billion dollar money laundering operation.
I think you have unintentionally predicted exactly what will happen.