I think we'd still adopt crypto in Africa, but the adoption might be slower than we know. I think this is why some African countries are still slow in the adoption of technology that could change things. However a time will come when it'll be different.
Just like real life situation, crypto can never be perfect and the reason for this is that there will always be scammy projects trying to take advantage of people. Crypto allows for billions of projects, which means every day, there will be newer projects which means more opportunities to scam people will present itself and people would have to do their research as well as learn. Without learning, it's difficult to understand crypto and this is probably why people can do better.