It can't be sure because each coin has their own strengths and weaknesses not only ETH. For example, ETH, I know that it certainly changed the approach to businesses and becomes th most smart contracts use this platform. For BTC, it is still dominant in terms of the price and capitalization.
Actually, Ethereum also strengthen the world of cryptocurrency, because of this a lot of new opportunities has come, and we are all making a life changing because of this one.