For a lot of people bitcoin is an embodiment of cryptocurrency so whenever btc price changes it pulls almost everything else after it. I believe with time bitcoin's share of the market will get a bit smaller which will give alts a bit more independence.
in my opinion, it could be said that maybe the highest value currency could be a guide and the possibility could happen without anyone predicting in the future what it would be like to use the possibility to get a profit with any coin
in my opinion, bitcoin also affects ethereum prices, and not only ethereum is still disrupted if the price of bitcoin falls. so the price of the ethreum will also be damaged.