I doubt the government will create a Cryptocurrencies as bitocin, because Cryptocurrencies as bitocin can't be control by government.
They could easily if they controlled the system that runs the coin.
how they can control a decentralized(so not controllable) system? it sounds like an oxymoron
at best they could limit it to a certain degree
their own cryptocurrency will be some fancy centralized stuff that we already know, and that aim at steal the bitcoin demand