PS: All the food and supplies will be purchased by the ones who have gold...
No, all the gold will be purchased by the ones who have the food and supplies. It is hard to eat a gold brick; better to have brick cheese.
Should we suffer a major banking collapse, all digital cash and money markets will vanish. No time for a run to the Bedford Falls S&L for greenbacks.
A tall stack of small bills hoarded in advance of the rush. A recommendation only. It might buy a little more time. Nothing more.