In order to succeed in this, you must have a business in an African country. Selling Bitcoin will generate large amounts of local currency , which you will need to use it to buy raw products from Africa and sell them to China or any other country in exchange for the dollar. You will use the dollar to buy more of the Bitcoin that you are selling for local currencies. without this closed cycle, you will find yourself either not having Bitcoin, or a dollar to buy Bitcoin, or you have a surplus of local currency and do not know how to get rid of it.