Why would they not continue to use bitcoin? International mining operations would be unaffected. But in the worst case of industrial crackdown, home miners would be able to win blocks again regularly and I don't see how that would be a bad thing.
Discussion
Fedcoin is Bitcoin when they will implement the "regulations" inside it, (for now it's only outside it, KYC exchange, KYC, ASIC buy and KYC pool mining), when the list will be enforced to the majority of miners. And when it will be done, will you use "Bitcoin" (Fedcoin) ? In that direction, I expect home mining (people mining) will be rejected by implementing a whitelist again on mining ability, only KYC ASIC approved will be able to mine, it will not be you nor me, just big companies which comply... maybe if you comply they will accept you... but at that point you will be a fed