yes it may happen but i think bitcoin has reached to a level where it is difficult for any other cryptocurrency to replace it or reached to its level because it takes a huge time to evolve and bitcoin takes almost 10 year to reached this level. in other words we can say that it is the mother of all cryptocurrency.......
very difficult for me. because bitcoin is an icon of the digital currency today. all depends on the price movements of bitcoin. so I conclude that bitcoin will survive and remain will be a digital currency that is most widely used.