yes get the government involved so we can no longer have privacy and taxless transactions. Morons...
You are forgetting about one thing. Bitcoin

Governments can have their own cryprocurrency just like they have their own fiat currency.
That incentivizes larger competing governments to attack the cryptocurrencies of smaller governments to exploit them. It's better to issue colored coins on the Bitcoin blockchain for the added security. Sure, governments could use pure PoS, but that would expose them to bad agents in their own government. Colored coins can be more easily managed and recolored for economic controls.
OK, don't laugh at me but....