Obviously, not everyone will be holding at the same time; not every investor will be selling. This is why we have both the giant holders who are whales/Institutional investors, and we also have the small-scale investors or individuals.
The best way to remain consistent in holding even in times when a lot of people are selling is to treat your investment as though it's not yours. By that, it means that regardless of the quantity of bitcoin you're holding, as the value goes down, reduce how often you take a lot at it and instead, increase on your accumulation stack. If you've agreed that you're only going to touch your holding after a set out year when bitcoin must have gotten to a particular value, just stay true to that plan and don't be pushed to selling too soon or else you risk selling at a loss and leaving in regret ever after.
If we are going back and look at history, yes, we have seen those individuals that sold early regret their decision. But those who didn't and who went thru hell in the bear market and just continue to buy and take the risk is big winner.
As far as the bottom price in this bear market, no one has the crystal ball and see what and when it's going to happen. Right now, if anyone are not aware of, there is a big problems with the holder of a hardware wallet. But still, it didn't affect the price to go down hard.