I think that the price of Ethereum by the end of 2018 will be about $ 2000, which is much cheaper than Bitcoin. However, the price may be even lower given Ethereum's downward trend.
In my opinion, it is not possible for ETH to exceed $ 1000 this year, so I think that now if investing in ETH would be a disadvantage for those who choose this option, nowadays I should invest in a new coin.