Now it is very possible, probably ethereum will achieve 400$ on beginning 2018. And later its price will be bigger
The price never moved forward after the sudden price increase from the two two digit mark. Once after a long now this time the price has increased a little in a gradual manner with small scale price variations happening with time. So, by the year end good price increase is expected to take place leading it to reach bigger values by the beginning of the falling year.