the concept of bitcoin has actually been created for a long time. but we must admit that btc is currently developing very fast. To make bitcoin recognized by each country it is difficult. but someday I believe that bitcoin will be recognized as the single currency used in the world
Indeed. Cryptocurrency is hard to reocgnized by some country because some country did not want to accept it, because of some reason just like they want to avoid to have a possiblities of entering some illegal activities using cryptocurrency in their country. But some country are open to try cryptocurrency to have a better economic, because it can help to improve economic though it depends on how they used it.