I am saying again I am just a newbie who is trying to understand these market.
Bitcoin is a way for the altcoin to determine its value and from there that's why altcoin totally pegged with the bitcoin caused by altcoin have been using bitcoin as a way to know how much it will worth.
You should read various article on the internet to know more about the correlation between altcoin and bitcoin.
Bitcoin is the history of altcoin. Altcoin generated from forking the bitcoin code.