bitcoin is a future digital currency, i strongly believes that before BTC celebrate 50 years in existence at least one or two African countries is going to legalis it. because block chain network is expanding every day by day. and most of the countries in Africa have the knowledge BTC how it works.
How you believe that before bitcoin celebrateit 50years the one or two African countries will only legalized it where already I am seeing more than five countries don't have any ban on there. Are you saying this based on correct information? I am seeing that in Africa - Namibia, South Africa, Angola, Mauritius, Central African Republic, Tanzania, Nigeria in these countries bitcoin is legal some of them have banking ban but most of them legalized bitcoin. If you want you can check this information from Wikipedia-
Legality of cryptocurrency by country or territory.
Moreover, the countries where bitcoin is illegal are called third world countries and it is a common problem of third world countries and first world countries have no problem to legalize bitcoin. Because they know that only by Legalizement of Bitcoin will it be possible to control it, I mean it will be easier to detect criminal activities.