There is vast difference between coin created by government and bitcoin, all government issued coin (if they will issue one in future) will be centralized and will be in full control of the government which is just like virtual bank balance we have right now so pretty much useless.
Bitcoin is decentralized, anonymous, limited and self sustaining that's why it is most valuable coin out there.
No matter how many times you ram these points home, very few people here seem able to understand it.
A countrycoin would make the case for Bitcoin 10x more compelling than the current banking situation. They could reverse, freeze, delete, inflate, debase, all from the comfort of their own offices. Their control over everything would massively increase with a countrycoin.