I predict Ethereum will be between $380 and $400 before the end of 2017. 
For sure it will grow in terms of price. Next target 400$ in 2-6 months maybe.
It's indeed possible the target would be lower or higher than your expectations. My bet would be $500 to $2k next year since pumping up is a very trend today. Big Whales and traders can affect any cryptocurency if they wish to bubble up the value. So, let's hope they'll give Ethereum a chance to pump and compete with Bitcoin and Bitcoin Cash.