When bitcoin rises, the altcoins keep the price and if when the bitcoin falls the altcoins fall even more. Why do altcoins usually follow bitcoin?
Well, I guess not all the time, not all altcoins then follow the trend but some do the opposite.
https://www.coindesk.com/markets/2022/03/10/market-wrap-bitcoin-stuck-below-40k-altcoins-see-less-selling-pressure/I figure this new sentiment in the market and some altcoins are moving in the opposite direction. And this is because not all projects are relying on Bitcoin and not all investors also had focusing on Bitcoin alone.
In some cases, some investors diversify their portfolio into altcoins once Bitcoin prices fall making altcoins spike.