A LOT markets will be out of order and errors so you can't even sell or buy.
I can't tell if your predictions are going to be right if this happens then most markets will be doomed and we go back to the Lehman Brothers days when everything was absolutely terrible for the entire market. But this is the reason why most markets are liquid and with this, this makes people confident that what you are saying isn't going to happen. There will be for sure a big crisis then if that happens based on this that everyone can't even sell or buy.