because Bitcoin is like an altcoin parent, so it's natural that altcoin follows the price of bitcoin.
Bitcoin is the main coin that is the benchmark for investors and companies, so if prices fall, it will have a big impact on the altcoin, so Altcoin also falls.
but I don't want to think too much as long as ETH is still good for investment, I don't think it's not a problem because I'm sure if bitcoin rises, the ETH will also rise