Bitcoin can not drop to zero, it is not like other altcoins that does not have value in the market. If Bitcoin is experiencing the bear market that doesn't mean the price of bitcoin will drop to zero. It is only shit coins that have the tendency to drop to zero.
what you say is true, because bitcoin is different from altcoins, and if for example the price of bitcoin goes down very deep I think people will definitely sell altcoins and will switch, that is, they will definitely buy bitcoin. so my view is also bitcoin will not touch zero price.
Agreed the market of bitcoin is different from altcoins. People swap between the two. This keeps the market for bitcoin amidst different forms of issues around. So, usage keeps the circulation stable and never let the price down beyond certain limitations.
In cryptocurrencies, the parameter for price movements to date is bitcoin, so if bitcoin goes to zero, the history of all cryptocurrencies is complete, because it's like a baby who doesn't have a nanny, and bitcoin is that caregiver. therefore I think it is very difficult to make bitcoin to zero. especially now that bitcoin has spread into many hands, so it is very difficult to make one thought, and I don't think the whales will do it, because the money field for them is this market