I have not read a concrete evidence that suggest that the market will crash if there is already a vaccine for CoVid, actually it's already a done deal, we have CoVid vaccine coming within 3 months that is a guaranty, but look at the market, they are still doing great, if the speculation is true the market should start crashing now, but it's not happening and I don;t think it even if the vaccine is out.
I think that defeating the virus, on the contrary, will lead to the growth of bitcoin. Bitcoin directly depends on the global economy - if everything is good with it, then it grows, if a collapse occurs, then it falls. I think all remembering the March events. This fall surprised many people, but it was logical as the global economy was crumbling and the outlook was very bleak.