Bitcoin can't help an entire country. but it can surely help the person who use bitcoin if he's poor. and if a country have a lot of bitcoin users then it will surely be beneficial and for that country.
bitcoin need some contribution. if you contribute with bitcoin and crypto currencies . they will reward you for sure. but if you think bitcoin should give you fortune without doing anything just because you are a poor person then keep dreaming.
That`s right at some point.
Maybe bitcoin can help some poor and small countries if they adopt it 100% and use it as paper money.
Bitcoin price can be more stable than the national currency rate of that country and this is a benefit.