I heard a news about Bitcoin in the Africa that many countries are taking in consideration approving Bitcoin as s currency, I don't know the validity of that news.
Yeah, I have also heard these "news", mainly from accounts with not much experience in a certain forum.
Please provide a source for these news. What I consider more realistic is not that they are "approving" it as a "currency" (at least not as a "legal tender"), but regulating it like many countries have done. That could be positive (liberal regulation, like in Japan or the Phillippines) or negative (restrictive regulation, like in Bangladesh) or something in-between (Germany, USA).
Some news items from the last year (all three are relatively positive):
Uganda Takes its First Steps Toward Bitcoin Regulation
Mauritius: The Tropical Paradise Looking to Become a Blockchain Hub
Central Bank of Nigeria Says We Cant Stop Bitcoin