Yeah,if bitcoin collapse,altcoin would likely take a hit too
Bitcoin as a cryptocurrency basically controls the movements of other cryptocurrencies.Bitcoin is the biggest player in the crypto space so when it stumbles, the whole market tends to shake too.When it depreciates,it is likely for other cryptocurrencies also to follow likewise the reverse.
Although, some altcoins might still hold up better than the others if they've got a strong tech or arent too tied to bitcoin's price.
But still,no one is completely immune to a bitcoin downturn.