Like what Lao Tzu once said, "Give a man a fish, it will feed him only for a day. Teach a man to fish, and feed him for lifetime". Why not create a blockchain project that focuses on teaching or educating Africans to earn for themselves(for example an online schoool using blockchain as it's backend)? That way, you and your partners wouldn't only be helping them to get by for the day but for lifetime. It might be hard but I am sure someone out there can pull this off.