Yes, in my opinion for the next few years we will all be very surprised by the fact that we will see in the cripto currency market, Bitcoin can stop being number one.
Why can it stop being number 1? Now bitcoin has 53% dominance. Does he have competitors now?! Who?! The Ethereum?! Ethereum has very few chances, because he himself has very strong rivals. And besides, the Ethereum has very big problems with speed, which has not yet been solved. So bitcoin is likely to be first for a very long time!