If it's a country's cryptocurrency, then it's not real crypto. We make real crypto because we know we can't trust governments. Ethereum gives us the power to make a program, make it available to everyone, and lock ourselves out of it forever because we know we can't be trusted. This is called trustlessness. Governments will never make a trustless asset because they want special authorities. They'll keep special keys that grant access to functions normal people don't have. We have the technology to do better now. Not using it is snatching defeat from the jaws of victory.