i think not bitcoin and ethereum are two different altcoin. each of them have diff program and diff progress. the question is would ethereum will reach bitcoin? or bitcoin will down to ethereum? my thought is i dont know for now because they are diff.
I dont think that Ethereum is future. it is the second biggest coin in the world and as I think it will never surpass bitcoin because still most of the people believe in bitcoin the most and they will never prefer an Altcoin instead of bitcoin. No doubt that the Ethereum investors would make huge profits in the future but if you think that it will take over the market it is not possible.