As we can see in the graph, Ethereum is clearly inching away from the 500$ mark now at 430$+. Maybe it's not the year for ETH now to reach such price but maybe next year, it will rise dramatically more than what we speculate for.
ETH is going down because people are changing to invest in Bitcoin. They wanna receive Super Bitcoin, Bitcoin Platinum and Bitcoin cash plus in this December. No problem! Ethereum will comeback in 2018