I am not surprised for a couple of reasons: The first one is that bitcoin tends to do well in two types of countries, that is, those which are following irresponsible monetary policies or have serious issues with governance and, on the opposite side of the spectrum, those that do very well and have wealthy citizens buying bitcoin.
The second reason is because when you have little, is easy to see it grow massively even with moderate adoption.
I agree, Africa is a continent that consists mainly of very poor and corrupt countries, but on the other hand also a continent very rich in various resources that are mostly exploited by political elites. Ordinary people have always sought a way out of such a situation, and in addition to the inevitable migrations, they now see their opportunity in cryptocurrencies.
The problem, of course, is that most of the political establishment does not want to accept that ordinary people prosper, because people who are poor and dependent on state aid are also those who do not create problems. Of course, there is another side to the story, and we all know that for one good and an honest man comes at least two dishonest people who abuse every tool that should primarily serve the good. This problem can never be completely solved, but it can be reduced by legalizing cryptocurrencies and placing them in some kind of legal framework.
I often watch documentaries about Africa and its people and I am fascinated by how someone can be happy with so little (compared to those living in developed countries), and I hope that honest politicians will start coming to power and change things for the better.
When that happens, I hope that this picture will change, because as we see, the African continent has the most countries where the corruption index is at the highest possible level.
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