Markets can stay irrational longer than they can remain solvent.

ETH might surpass BTC. Until the ICO bubble pops.

Of course then it will be also the question if it will take BTC down with it. An altcoin as big as ETH collapsing might cause a panicsell all over crypto.

So after they both collapsed and the bear market is finished. Which one will emerge again? Time always tells which one is the best. ETH surpassing Bitcoin proves nothing for it is just a temporary snapshot of the crypto story. And I don't think that after the ICO bubble pops, there will be as much "startups" asking for funding through ETH again (its main use now). Who will want to be funded through something that has proven has collapsed before?