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?
First,if you have a legit Top 10 list about Bitcoin trading could you please share it with us and leave a link.
Second,what makes you think that the information of this Top 10 list is legit?Can you verify it somehow?
Why are you comparing Nigeria with China?Why not USA vs.China or England vs. Nigeria?
China is about to become the biggest economy in the world and China has the biggest population in the world.It's pretty normal to have lots of Bitcoin traders in China,despite the hostile "anti-Bitcoin" environment created by the Chinese government.
AFAIK,Bitcoin is in the "grey area" in terms of legislation and regulations in both China and Nigeria.