Well, it will not. Ethereum will be the next Ethereum, and Bitcoin the next Bitcoin; they do not address the same use cases; one is a platform to build touring compete code upon it, has a head (Vitalik) and a lot of competition (EOS, Credits, Neo, Cardano etc.). The other one ia digital cash, that will never be killed, or detroned.
Bitcoin is above the other crypto, it has entered the culture, the history, and it works ! For 10 years, and more to come.