Etehrum is expanding the community. For me, investing in etehrum will be the right choice. I believe etehrum will become stronger in 2018.
I am not agree with you, because price of bitcoin is getting better so we should prefer buying the coin which will be low in price, bitcoin is not too much high in price and buying bitcoin right now can give us profit, as long term investment nothing can be more valuable than bitcoin, because when we hold bitcoin it surely rise in price and we get profit at the end, so now is the best time to buy some bitcoin and hold them till the end of 2018, I am sure you will not regret for your decision.
That ethereum coin is also I would like to invest this 2018, because it has many uses, it can be use directly as gas for tokens to be traded in the different sites , and it is establishing its name in the coin market next to bitcoin and aside from it, it is not big value when we want to invest unlike bitcoin which has a great value for investment.
With the fall of prices in coin last month it provided very good option to people to buy the coins at very low rate. It could be btc, eth, or some other altcoins which is still available at discounted rate . So buying now and getting the fruits in some months as a profit will make you more successful.