Considering economical condition of the African countries, it is unlikely that they will take the crypto currency as their main currency. They are trying to making money out of the cryptomarket and they are doing a great job at it.
Volatility is not a problem because I am sure when more and more countries accept bitcoin, its value will go high and high and so the price. Dont be panic about the current situation of the market. It will convert into good market in the near future. If you want to make money from cryptocurrency you will to take some risks. Cryptocurrency investment is not gambling, so be optimistic about the future.