in my opinion if I may suggest, ETH has the potential for long-term investment, and also I suggest Ripple (XRP) this coin is trending and the graph is very good of course the potential to invest both long and short term. 
I only trust ETH because this technology is developing very well in recent times. If there is a clear development strategy, ETH will soon reach a very high value in the future, but currently the market is in a difficult period so the price increase is not possible. It will probably take a few years before things get better