ethereum holders will only enjoy the price increase that occurs from ethereum, while for bitcoin reversal, I don't think ethereum will be able to do that. In fact, when you look at the percentage increase in price, maybe the price of bitcoin has increased not so high, but in fact the price of bitcoin is very high. even a few percent increase, it will have a very large effect on the price.
other than that, for now, I'm pretty sure that ethereum also continues to depend on bitcoin. if the price of bitcoin falls, the price of ethereum could fall even more than bitcoin. no matter how passionate people are about ethereum, I'm still pretty sure that it won't replace bitcoin with ethereum.