At first, I was also confused when the price of bitcoin dropped and altcoin prices also fell.
I think Bitcoin has a big influence on the price of Cryptocurrency in the market.
No wonder the prices of Bitcoin and Altcoin are interrelated because Bitcoin is the oldest coin that appears in the Cryptocurrency market so that Bitcoin is used as a reference price for other altcoins.
This is why Altcoin prices always follow the price of Bitcoin.
Bitcoin is a leader in the investment market and will always remain with them. Other coins will always be equal to its price and try to outrun it.