Maybe, maybe not. Nobody can tell with 100% accuracy that bitcoin will be the future currency. But yes there is a possibility that said by many economic analysts. It will happen as soon as the governments of the world will legalize cryptocurrency. But it is not so easy. The maximum countries in the world are against crypto now or they don't want to talk clearly about crypto. So it will come in the future but it is not so near to now. we need to wait for some years.
quite difficult to get the legality of digital currencies worldwide, unless there is a ruling country that can affect global currencies that can announce that crypto can be used as a legal payment instrument in every country and guarantee that crypto will not affect the major currencies owned by every country, of course such things can be said if crypto will be centered on one ruling country, everyone certainly will not be comfortable if that happens in the future