:)will all country will accept bitoin as a currency in future
I think no. Not all the countries will embrace bitcoin as their currency in the future because now there are some countries who already ban bitcoin. And what more in the future right? It will be a possibility that they would unban bitcoin if they would learn the concept, benefits, advantage, etc. of bitcoin in the world. Once the dissemination of information about bitcoin is done, then there is a higher chance that most of the country will accept it as their own currency but it will take time to happen.