ethereum is only the king of altcoin and will never be able to shift the crypto king to ever. I mean here is bitcoin. their differences differ greatly. although many say 2.0 will drive ethereum prices but that still won't make ethereum number 1
If it does happen someday it will certainly change the order of cryptocurrency that we know that now their average conversion using bitcoin is unlikely to be changed by ethereum. although I myself am also sure that such a thing would seem difficult to implement now or in the near future replace bitcoin