If Wakanda is true, I think they would be the most advanced here in the world but it just exists in the Marvel Univers. Lol.
Kidding aside, knowing that it could probably change the world, I have seen a great article towards that. A lot of startups are growing there and there are a lot of people who want to improve it. The article is a good read.
https://www.nationalgeographic.com/magazine/2017/12/africa-technology-revolution/What makes you think wakanda is not true LOL. Africa is really improving too in their technology and their internet usage over there too is quite high, provided these two things are in place, cryptocurrency might even be more adopted than other parts of the world.
The next generations being born in Africa now are already moving away from the old ways of living into the world of technology, I have met quite number of people from there with families, what their little ones do with technology is quite amazing and also for the fact that they are always willing to learn new things.