Africa isn't "a large segment of the world economy",actually it's a relatively small part.I remember that the African GDP was more than 1 trillion USD,which is very little,for a continent populated with 1 billion people.
I think that Africa needs industrialisation first and then crypto adoption.Most of the african countries have 80% uneducated population of peasants,who can do only agricultural work.
This is the correct view in my opinion, the GDP per capita of the African continent is incredibly low, it is 3.5 times lower than the next place which is the Asian continent, so before that a revolution is needed in order for the continent as a whole to become more productive but this is going to be almost impossible with the huge level of corruption from their governments.