Though ethereum has good potentials and has a very good future and it seems best for icos, I still think it cannot reach the price of bitcoin because bitcoin remains the mother of all crypto and what ever affect s its price affects altcoin too because it controls their price. Bitcoin will continue to grow and remain the best crypto while ethereum will remain the best for icos.
in any case, everything depends on the demand for a particular coin in society. Thus, there are forecasts that the etherium will overtake Bitcoin by capitalization, And this is already a direct competition in the market.