I can 100% guarantee it will never hit $0. See above.
One ECM jammer or global power surge and bitcoin will be dead. Something like bitcoin crash can happen after 51% attack as well. For now I would rather believe that bitcoin could be de dead than it will cost more than $1000 again.
An ECM jammer or global power surge would bring down the internet and all traditional fiat payment systems as well. This is not a Bitcoin-killing scenario. It's a societal collapse scenario. If this happens, your dollars will be just as worthless. Currency will be water, food, and ammo. It's silly to bring up such a scenario here.