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.
If you have lots of money then bitcoin should be your first choice and if you have small investment then you have different options for investment. Ethereum is on the top in Altcoin and then Ripple and litecoin and many more. All are good and will give you good profits in the future, just need patience and courage and if you have these qualities then you can earn money from crypto.