Don't worry there are already big countries that are looking to the point of adoption bitcoin or including it to their banking services. And even those countries that did ban bitcoin, I think that there is going to be a change of their decision and will let bitcoin come to their country when they saw that the market and potential of this to boost their economy.
What do you mean by that?
Do you want to say that they will accept Bitcoin as it is, and, for example, allow folks to open bank accounts in bitcoins or pay taxes with it? Or do you mean that they will just adopt the blockchain technology for their own, most likely nefarious ends? If you mean the latter, then why didn't they adopt the technology long ago since Bitcoin has been around for ages already, figuratively speaking? If they were really interested in it, I suspect they would have been using it already in some way given their resources and capabilities. But there's nothing yet as far as I can see