I doubt that , however there might be a currency that will do very well more than bitcoin , e.g in fiat world where you have different currencies doing very well
Time will come in the future that bitcoin will not be supported by the people but we should not wish for that to happen. What we need now is to support bitcoin with the best that we can and to make this more progressive, if something comes up to replace bitcoin then I will just jump as long as it's profitable.
its crypto so from time to time they will try to create one another but like you i will keep supporting btc while adoption is really on progress just in case there's a replacement happen i will also invest with it but i will never leave btc as i see much bigger feature in the long run.