If Bitcoin falls to $5,000, naturally all alts will start following Bitcoin and are likely to fall even harder than Bitcoin
Unfortunately you are right. The entire cryptocurrency market is stick to Bitcoin price. However, I think that some altcoins are no longer in danger because they are already at the very bottom.
I am hoping for an exception - If the Bitcoin price actually continues to fall, I hope that Ethereum fork will succeed and this will cause the ETH price to break away from the BTC price and start to rise.
Honestly, altcoins have no bottom. Its price could go down as low as possible and die if BTC went down like 2018. I saw a lot of altcoins at the bottom and now it's dead.