Ooohh that's some nightmare you had.
Of course is a negative price is not possible.
But just the imagination that the price went down to zero may you have wished dreaming of ugly spiders.
I believe many people had similar dreams where bitcoin was doomed or something else took it's place you thought all your invested money was lost.
When you awake it's a blessing to realize that it was just some bad dream.
I also dreamt that the graphs at cryptowat.ch went nuts cause of the negative values. That they were not programmed for that scenario! Which site do think I immidiately checked when I woke up Big relief still at $600!