At the moment you can invest in ETH and XRP. I don't understand why you're putting competition between these two coins. These coins are very promising cryptocurrencies and I have invested in both.
I remember everybody was in a panic a year ago: people were buying a lot of Ripple at $1. And where are they? It's a very deceptive market! I think we'd better wait at least 6 months and see whether Ripple's worth buying
I think that you should better concentrate on the other altcoins. There are tokens on the market that worth our attention. I think that Ontology and OmiseGo have the greatest potential. I trust TRON as well.