It really depends to which part you're referring to. If we take North African countries such as Algeria, Morocco, Tunisia, etc. then bitcoin is already being widely used and also definitely needed.
If you are talking about some parts of Africa where people don't even know how to eat, I'm sorry to say, but personally, I wouldn't be interested in hearing about BTC. You should know that these people are not educated, and even though it's easy to say that the price will skyrocket, etc. they simply can't afford the risk and the price's volatility.
I second OmegaStarScream. I am from Africa, from Mozambique to be exact, and, althought, I have some knowlege about BTC because I have access to internet, international news and all, I know that many places in my country have still no internet access, or worst, they dont have access to clean water nor electricity. In their shoes, I wouldnt care about not knowing about BTC, because it is something that they wouldnt even think before have sanitary and hygiene needs cleared first.