how many country of the world now accept btc?

Well if you haven't heard, India has legalised bitcoin recently, whether this is good or bad is still yet to be discovered. On one hand more countries accepting bitcoin is always good since it brings more attention, but since power in India is super cheap may pose a question for the miners.
I think it will have a good effect on bitcoin or its users. Of course there will be many parties like stores that will receive payment with bitcoin, and certainly there will be many people who will start using bitcoin and of course this will have a good effect on bitcoin