It's a nice thought, but economically speaking, even if massively adopted, BTC couldn't save a country from bankruptcy. A currency that they cannot control wouldn't become the primary currency of a failing economy
A currency that's actually useable & trusted by the people is better than the debasement of banks & greed of government officials.
I agree that its better, but unless there is some massive revolution with a government overhaul, they will still be in charge