When Bitcoin rallies hard, altcoins dump. When Bitcoin dumps, all the rest dumps too. But when Bitcoin is sideways, altcoins rally and some go their own price action.
That is what happens in the crypto market. Bitcoin is controlling the market, so when bitcoin dumps, most of the altcoin dumps too. But we will have a chance to see bitcoin and altcoin rally side by side in the next bull run, and that will make the price will increase. Related to ethereum, I think ethereum still trying to reach the higher price but with the bitcoin price is up and down, I think it's hard for ethereum to make another higher price. Maybe after bitcoin can break more than $10k and sideways, the altcoin especially ethereum, will get the chance to rally.