Well I don't think crypto alone will have the power to drag these countries to the same level of the more developed ones, but I think they will have a very important role in their economic evolution. I would not be surprised if the first places where we will see bitcoin mass adoption, will be in these poor and undeveloped countries. Most of their population don't have access to bank accounts, and bitcoin can help here. Their coins are usually poor, and have no economic power, and again, bitcoin will help them here as well. These countries will be the perfect test environment for crypto, and I'm sure their economy will have a lot to gain with this process.