At this moment the Nigerian government are not against bitcoin or cryptocurrency as the ban against crypto in 2021 by the former administration has been lifted by this current administration, the problem is just with those corrupt law enforcement officers (the police) that are using their uniform to intimidate, harass and extort crypto hodlers and traders of their assets if they notice you are dealing in the currency or peradventure they do an illegal stop and search and finds a crypto related app on your gadget then you're screwed as they will coerce and intimidate you into releasing your coins to them. And they make sure all evidence to their trace are whipped off.
As crypto users finding yourself in this milieu it's imperative you take your privacy to any trace of cryptocurrency seriously, if it's by freezing your phone when going out or having a different gadget that's not about your crypto business/trading/holding etc. I am sure with time the government will take cases like this seriously so as to fish out such corrupt officers from the streets.
I would say that is not really unheard of anywhere else neither. Maybe not regards to crypto, it could be about something else, but "corrupt cop" is something as old as time, I have watched maybe like 100 movies where drug dealers end up paying bribery to cops, and cops look the other way and let the drug dealers do their business. This may not be related to crpto, but it is about corrupt cops and it's usually in the USA movies as well, and based on real life in most cases as well.
So as you can see, Nigerian cops could be corrupt and do this related to crypto, and I think that is sad, but every single nation in the world has corrupt cops that will take money from you in one way or another, that is sad but the reality.
Yeah, you are right there no single society with no corrupt cops but just that in some it's so glaring when compared to others, and a lot of them do it with so much impunity because the system is so filled with the corrupted than the good cops. Just as someone told me years ago that there's no form of illegal deals and actions going on successfully in any society that the cops aren't aware of or playing a role to it success. And it's the value of bitcoin today that have marshaled some of corrupt cops in the country to divert their disservice of illegality to the uniform they wear to crypto users and holders unlike years back it wasn't about crypto.