i think bitcoin can't help poor country because in poor country. alot of them have a currency not easy to bitcoin help them
If there is an easy way of exchanging the local currency to bitcoin and vice versa then I think the picture might be different.
However I believe that bitcoin can help the economy of a person and not the entire country. Changing the economy of a country is a very tough job and it requires huge input for some individual bitcoin group, and I doubt anyone would try to do that in real life.