Actually the assumption is impossible. No asset class in history I believe has crashed to a $1 Overnight . Even if it were to crash to a low price it would take many months, maybe years. When a companys stocks tumble because of liquidation it takes months, years too until its delisted.
If on other less regulated market places it did, short sellers could easily arbitrage and for $5 in insurance would buy 5 Bitcoin and run the token into zero value.
your views?
Yes it is true that it is impossible for the price of Bitcoin to experience such a situation. As long as there is still a need for Bitcoin then the price of Bitcoin will still be attractive. 1USD is nominal which is very low and in my opinion it is impossible to happen. Bitcoin is very interesting and is used by many people, quality and demand factors do affect Bitcoin and therefore I am very confident that the price of Bitcoin will actually increase.