If bitcoin decreases its potentiality, it will be a good time for the Eth to take over. But for now, I don't think ETH will crossover the BTC in the cmc. But for all the alts that wants to be so potential like the BTC they have to high their standard so that traders will get in. But in addition, for all the new alts like the aci coin, time will come people here in cmc will get attached into and grows more.