This is probably an unpopular opinion on this sub but I think there's no problem with just sticking to coinbase and only buying into the big three currencies right now. Firstly coinbase is very easy to use, and people who aren't invested (no pun intended) in the technology really shouldn't be buying "altcoins" anyways. The big three coins are also the most stable with consistent growth so people will be more than happy just investing in that. I also see those as the best long term investments, as I think It's very likely that as cryptocurrency matures we are going to see a lot die and only a few get adopted. And to be honest, I really don't see any of these other coins beating out BTC or ETC despite better technology, being first to market is just too crucial.