I believe that ETH will stay in rough trade proximity to btc ratio as it has been, making it a safe place to store crypto with lower tx fees, etc. So I keep value there like many do with btc. I have decent expectations for NEO, I suggest reading their white paper. and any other whitepapers for any crypto you are interested in. That way, you can decide for yourself which coins have the proper "why" for your own liking.