Drop Bitcoin below 2K again and from then on it will take a long time for Bitcoin to go back to where it is, or maybe it won't recover and Bitcoin will just die.
I don't think so. Where do you draw the line from Bitcoin being alive and Bitcoin being dead? If the market goes back to mid 2013 levels, has it died? I for one would still be using it in that scenario. So it would have at least 1 user.