I think every country has their own economical reasons for the ban .Ranging from economical standards to general politics and how they influence the financial market of their nations has a greater impact .Its banned in countries like India /Pakistan because their govermnet is not supportive of them using technology to such a level as most of the population is not exposed to it .However they have given freedom for whoever wants to use it they still can.
Well, countries like Kyrgyzstan and Vietnam have explicitly banned Bitcoin but it seems that the countries that have explicitly done so also always seem to have very shitty, corrupted governments. I don't think we'll see a Bitcoin ban in a country like the US or the UK, even though we don't exactly have perfect governments arguably.
