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
Bitcoin will not save countries.
It will save people.
Wow! I think you're a bit optimistic. I'd say
BTC can help, but some people won't understand how
BTC can help them, or they might not want to be helped.