That was giving us a lot of explanation if you were not a part of the early adoption of crypto. It will not the price of altcoin depends on the bitcoin and that's the main point. When these coins worth zero and bitcoin too. This is a speculation market and everything can happen.
The alt coin market might go to zero but that does not mean that bitcoin will die in that situations, it will keep on moving forward and nothing can stop it, the entire market is not speculative, there is a base foundation for the coin because of the utility it offers and the businesses that invested billions in the bitcoin market, so a multi billion dollar market will not die just like that.
@OP The alt coin market does not need to be negative during the bitcoin rally, the entire market will rally according to the bull run.