I think it will easily be 5k and higher in 2018 due to price appreciation from the growing crypto market, the buy&hold taxation issue currently in play, and the huge numbers of ICO's that are using it for the smart contracts and need to buy it to transfer into new coins being created, which are showing more utility than ever.  If one tracks the current ICO market, we are finally seeing coins with utility being created, which will completely change the shitcoin market into a much more viable market filled with companies DOING things.  Ethereum is the peg for many of them.

Current price of Ether - around $750USD
Prediction for 2018 - 10X at a minimum.  $7500 per coin. 

It could also go much much higher if things like 'the flippening' occurs, or if BCH does different things, or if the market grows faster than a 1-2T during 2018, which is entirely possible. 

If Bitcoin truly remains the 40-50% base, and it goes 10X or more, believe that ETH will indeed rise at least 10X, and possibly higher, due to a wide variety of follow-me issues.

BUY ICO's that give dividends in ETH.  This is a wise choice since you get the underlying coin appreciation, solid companies, and payouts in ETH.  Look at coins like Spectre, for example, has amazing prospects to make you rich with ETH.  Do you believe that Crypto is going to supplement/replace/augment banks and financial institutions?  Of course they will.  Coins like Spectre are going to be the first movers in this space.  Or look at coins like Angel Token that will be investing in many coins and then spinning off dividends in ETH.   There are others out there in play and starting up that will do this.

So yes, buy and hold ETH, look into coins that also use it and pay out in it.  ETH is going to be hot hot hot this coming year.