I heard that some countries banned Bitcoin and 2 of them are China and Russia because the goverment think that Bitcoin deals are speculative, and the currency is always risky. But is it correct because there are a lof of Chinese use Bitcoin now?
Could you provide us with sources where have you got this information? To my knowledge they haven't banned them completely but rather are looking into ways to regulate them. In my opinion they know that its not that easy to simply ban cryptocurrency as people will use them anyway. Also I have been reading that some miners are looking to move to Russia which doesn't sound like a ban to me.