I honestly think that once bitcoin stablilizes we may very well see ETHEREUM perform better than BITCOIN. I believe this will happen because ETHEREUM is a must have coin when investing in startup projects. It. Has more functions than BTC and in my opinion performs better as well.
With new highs I believe ETH will have a better ROI!
Not forever but for 2019
But the investors need the profit and the stability which is more in Bitcoin than the ethereum. I have more trust in Bitcoin than ethereum for the investors as the community of Bitcoin is much bigger than the ethereum and we also know that the usage of Bitcoin is bigger than ethereum.