The government is smarter these days. I'm pretty sure they could figure what to do for bitcoin. And just probably, they may consider using bitcoin too. ITs always good to listen to what they say, like if you can't beat them, join them.
I won't be surprised if governments are already buying bitcoins in large numbers or owns good amount of it. If they are not doing this it will be wise for them to start now and create bitcoin reserve system similar to the one based on gold they already have.