There has been similar ban on cryptocurrecy with different reasons from different countries, but the Nigeria case is the same reason given by these counties that had ban crypto usage.
Intact, before the invention of crypto, these criminal activities like, money laundering, terrorist sponsorship, illegal fow of cash in and out etc; all these has been before crypto and will remain here despite any form of bans from different countries.
Let watch how this bans will play out in the coming months.