Bitcoin trading mainstream in China, however Nigeria is not among the top 10 countries trading Bitcoin , could it be that Nigeria government have not legalize Bitcoin?why is China among the top 10, but Nigeria isn't? That source is definitely wrong.
Where did you read that Nigeria is not part of the first 10 in P2P trading?
The only P2P tracking I know is Localbitcoins and everything else is going to be hard to track especially because none of it happens on chain.
But I suppose Defi/DEX trading is all onchain and that is easier to look for analysis, but Bitcoin represents less than 10% of DEX trading, as far as I can look?