Etehrum is expanding the community. For me, investing in etehrum will be the right choice. I believe etehrum will become stronger in 2018.
I think you should invest in Ripple because ripple is in the top three coins in the list. Sometimes it takes second position although the price of Ripple and Ethereum are very different from each other, but the market cap of Ripple is very high and that is the reason that it took second or third place in the top currencies of the world. It is fast growing crypto and you will be happy with your investment.