I think that Blockchain technology will take time to be implemented in countries like africa, because it is one of the most under developed countries in the whole world. There are many reasons for pushing down the economic slopes of african country and they are like War & terrorism, education and knowledge gap, Unending corruption, and health & poverty. If Blockchain technology  once implemented, then you can expect the benefits from it , but before that i would like to see some improvement in Education and knowledge gap area in African country.