I don't see how bitcoin is helping people in Africa getting food or avoiding wars.
Bitcoin cannot end poverty in this kind of society. Because some people think that investing in Bitcoin is a scam. They don't want to accept the fact that Bitcoin can change their life if they believe in it.
Bitcoin can't change the life of everyone in the world, whether they believe in it, or not. The early adopters obviously benefited from Bitcoin, in the form of huge ROI. But we can't expect Bitcoins to give the same amount of returns in the future.