Suppose you woke up tomorrow morning and found that Bitcoin had dropped to 0$, or that Bitcoin had disappeared or been scammed. How will you be at that moment?
First scenario; Bitcoin going down to $0. That would be a huge shock on my path, I'll probably be stunned for quite a while as I cannot think of any logical reasoning for that to happen; and my first step would be to know what might have caused that, let's say there was a hypothetical reason that made Bitcoin to lose all of its market value but doesn't inherently affect how it operates, I'll
definitely possibly buy more and hodl, hopefully the world comes back to its senses soon. I'll be wary of such situation happening again.
If it was a situation that does affect the integrity of the network, I might hesitate a bit to determine to what extent, before deciding if to buy or not.
Second and third scenario; are literally just wild assumptions. An individual can make a mistake and their bitcoins disappear or are stolen, if I were to be in that situation, it would be a huge burner and I'll have to start building from scratch again to grow my Bitcoin portfolio.
The entire network cannot disappear or get stolen.