This is completely an imaginative idea, Bitcoin will not crash to $500, not even like in 2018 when it dropped to $3k, one of the longest bear market in history of Bitcoin.
It is quite obvious that Nothing is safe as far as business are concerned, not even other sectors of the economy is considered safe in my opinion.
And still, even if Bitcoin manages to crash to $500, history shows that it always recovers. I believe that people get involved into cryptocurrency, and in Bitcoin in particular, so deeply, that it is not possible Bitcoin to disappear completely. Since it is impossible for it to disappear, there will always be a demand. If there is demand, price can be speculated. Even if price drops to $500, there always be those who will be ready to buy it with little price increase (at least to try to earn on speculation). Even if price fluctuates between $500 and $500.01, it is still profitable to resell it.
i.e. $500 price does not mean Bitcoin is dead.