I like them all (not all). I'm a collector, but diversification is necessary as a risk reduction exercise.
All cryptos are as much a technology proposition as they are a network one. The number of bitcoin holders is considerable, except in comparison to the incumbent, traditional payment networks. The Gini coefficient is diabolical, but most non-euro/dollar/renminbi/pound citizens would experience more friction spending their home fiats in most places, than bitcoiners. And the technology promises better outcomes for most sections of society.
I've only excited Litecoin because it's not the lightest. Ethereum are conducting a very admirable IPO. Is there even a minimum buy-in?