I have to say ETH is one of the currencies I've had the most success with flipping back and forth for some nice chunks of return of interest. It's not too hard once you learn to read the charts.
+100
Completely agreed, I've made tons (well for me at least...) just longing and shorting ETH. I have my long term stash too plus BTC too. However after BTC started rising I could no longer predicted what was going to happen and didn't do it anymore. In my opinion ETH held incredibly well, I thought it was going to be under 0.02 after BTC's bull run but I had some doubts and waited luckily. Look at ETH now hehe!