Etherum is extremely well ranked second after bitcoin. I think that Etherum can not replace bitcoin, but Etherum will have the same bitcoin as a solid base for the entire thriving crypto market. 2018 will be the strongest year for etherum.
Yes, Ethereum will follow in the footsteps of Bitcoin. The price of Ethereum will be the same as Bitcoin a few years ago. Maybe even Ethereum price will reach thousands of dollars someday. But to reach the Bitcoin price, I guess it will take a long time for Ethereum. The development of Bitcoin and Ethereum prices is very different. Bitcoin prices always go up quickly while Ethereum is not that fast. Maybe the price of Ethereum will reach $ 10,000 but it will take a very long time, even longer than Bitcoin. To accomplish one-tenth course can not.