BTC seems to be a big influence on the cryptocurrency market that when it goes up others follow suit as well as when it drops. Also those buying the crypto then to hold and hold all at once and those who sell also are likely to sell all at once so this definitely affects the rise and fall of cryptocurrencies
Simply because bitcoin is the blood of the crypto market and whatever it’s current price will greatly influence the prices of other cryptos. The reason why other cryptos fall too when bitcoin is dumping, and starts to see price surges too when bitcoin is pumping. And when the market is in bear season, then expect that all crypto coins will be affected and it maybe be hard for them to experience price growth.