The idea of Covid vaccine causing Bitcoin crash looks like a mere speculation. The upcoming election is more likely to influence its price than the vaccine production. Prove me wrong 
I don't think it is a speculation, I think it is a deception.
There are a lot of things that happened, Trump and the first lady tested positive, the pandemic happened and then the Vaccine? If the price ever fell the time that the vaccine is made, I don't think that the reason of it is the vaccine, it would just be coincidental. There is no connection with those two that is why I don't think it will be a cause of a dump.
There is a lot of panic because they often see invalid news, therefore people will always connect to bitcoin as the start of a big dump after a lot of bad news, for example, with news about positive Covid-19 trumps with mass production of vaccines is also not necessarily true but for me this is natural thing and no one can speculate about it, everyone can make up for it.
Bitcoin will survive and will not crash too badly due to a vaccine that has been found or marketed. Obviously, we must be prepared in any situation, don't look at the news that is not yet valid.