There is no next Ethereum as it isn't the next bitcoin too. But like bitcoin, ethereum offered a unique use of blockchain innovation. Ethereum has done so well and it was first to market and has a very strong team. I think that it's exceptionally difficult for new currencies to compete..

So for me, I still look higher at ETH alone, in fact, even though I trade other coins, still, ETH  has the highest percentage for me, along with BTC.