Your title asked a question about Bitcoin and it's ability to help poor countries or nations. But the content of your thread is drifting and rather focusing on crypto generally. Bitcoin is a crypto currency yes but that doesn't mean when comparing crypto currencies you will want to generalise everything as one and the same thing. Bitcoin can help a country grow out of poverty through strategic reserves. They use their national reserve to buy some Bitcoin store them and expect the profit after some years.

Not all crypto currency guarantees this. So to avoid making mistakes on which project or coin to move with it's best if a country limits their investments to Bitcoin, after some years use the profit to develop their country and Invest in other real life development and also in the advancements of their country. Every nation that came out of poverty had a time they made an investment in that changed the GDP of their country.