maybe next year or in 2019-2020 we will have a lot of sellers who accept payment by bitcoin, bitcoin is in the stage of slowly being famous around the world, lets just wait and everyone will notice it since the prediction next year with its value might rose up to 10k$ or even more.
No one knows, maybe the next year more countries will accept bitcoin on their retailers. To be honest it's hard to motivate retailers to accept bitcoin because the price of bitcoin that can easily decrease. The bitcoin price is fall right now, imagine if the retailers accept bitcoin, the price will always changed because of that.