I don't think that Etherium will ever manage to bitcoin as cryptocurrency No. 1 because all of us know that the Bitcoin has much more users and investors in comparison with Etherium which is younger. Always was in all news that the bitcoin is on continuous increase in its market value, despite some time when its market value falls. He always seeks to rise again, covering your losses and acquiring profit.
Ok, do you know which company was the king about phone on the world in 200x years? Maybe, you knew Nokia, this brand was the King in my country to sell cheap phone device. Everywhere, you can see Nokia device on hand of everyone. But sadly, until Samsung, iPhone and other companies joined this field, Nokia accepted to sell their company to Microsoft and bankrupt. Therefore, from the story about smartphone field, I think cryptocurrency also like smartphone, old technology will be kill by new technology.