If price goes to bottom then people who are true believer of bitcoin will buy bitcoins in bulk which will again boost the price and regain its position again in future.
Definitely, I believe it's established enough where it can never hit 0 unless digital communication/blockchain communications get blocked somehow.
Yeah i would also buy some bitcoin if they go to all time lowest but not sure if i would shift focus to other coins cause they will repeat history. If bitcoin doenst work then the concept of cryptocurrency will be very hard to execute succesfully. especially because the reputation will be ruined.