For me, I don't think that Ethereum can beat Bitcoin as the Number One in the crypto market, it's because Bitcoin is getting more and more bigger each day because there are more investors coming every time and Ethereum still has a lot to improve in their blockchain and their security features.
yes i do believe it, i believe that ETH can outlast BTC in the future, but i don't know why, maybe in 2019 or 2020, it's still won't happen in the near future, because the price of both of them is still in the average range.