I personally don't think that etherium pairs are good, because as we can see etherium isn't stable as well as any other cryptocurrency, moreover it depends on the moves of bitcoin, which makes it less effective and less independent. In my opinion, all the pairs which are connected to etherium and bitcoin are weird a bit. It's better to use pairs which are connected to TetherUS, because they have a stable exchange rate. Anyway, all traders decide on their own which currency pair to trade, if you understand all the risks and you're ready to take them then you can apply to etherium currency pairs.