In reality there is no chance at all that a digital currency would be allowed to flourish, as it would represent possibly the greatest single threat to the welfare state. The US government requires dollar hegemony in order to function.
Taxation on transactions, prosecuting those who accept the competing currency as payment, or freezing bank assets (as in this case) are all inevitable for any competing private market currency that gains traction. A few years back a 100% gold currency successfully launched, and even though that currency had appreciated against the dollar it was shut down on counterfeiting charges. It just isn't going to happen unless unforeseen, extreme scenarios emerge.
Taxation on transactions, prosecuting those who accept the competing currency as payment, or freezing bank assets (as in this case) are all inevitable for any competing private market currency that gains traction. A few years back a 100% gold currency successfully launched, and even though that currency had appreciated against the dollar it was shut down on counterfeiting charges. It just isn't going to happen unless unforeseen, extreme scenarios emerge.