ETH already has half of the worth of BTC on the market. And it have been only a year. I think it can overtake BTC in a couple of months.
Etherum does have a significant rise rate to date. The etherum price increases over time, but in fact it may not be able to compete with the value of bitcoin. It still takes a long time for etherum to approach popularity levels such as bitcoin. I think maybe etherum takes 2 to 4 years to reach a level like bitcoin.