Ethereum is the best partner of bitcoin, during 2017 ethereum prices were around 5% of the price of bitcoin. when the bitcoin price is $ 5600 then the ethereum price is $ 280
But why since 2018 until now when bitcoin has reached $ 11 707, ethereum is still $ 227. The ethereum price should be $ 585.
What happened

if bitcoin price is $ 20 000 then ethereum price is only $ 600

everything that happens in the market is really out of our control ... anything can happen on its own without us guessing before ... and we can hope that if ethereum prices will improve and will follow the price of bitcoin like in 2017.. but it's not all as fast as we think, it all takes time and process.
That is why the market is always very volatile and we cannot predict the next trend of this market. I have been following this market since 2016 and in the 3 years I joined the investment, 2017 was the year that surprised me the most about the growth of this market. Maybe this year is not good for investment but I believe that things will soon return in 2020 and we have the right to hope for a new future in the crypto market.