I guess it depends on whether the company with your precious metal in a vault chooses to honour your piece of paper or not. I guess the trick is to tap the "ship me my gold now" button before Mr Robot wipes their database.
More like whether the employees of the company who runs the vault realise that they aren't going to paid at the end of the month and simply run off with "your" gold. In a serious collapse it would seem the logical thing for them to do.