You seem to believe there will be a global hyper-inflationary collapse a worldwide Weimar Republic scenario leading to a global dark age and a return to a simpler time with metals used for day to day transactions. This is not going to happen.
No, I actually don't think anyone knows what's going to happen, even the bankers themselves. Unlike Anonymint, I do not believe we live in a deterministic universe. The only thing I know is that somewhere in the timeline where all this occurs is that people holding both metals will see a large increase in buying power. When you see metals spike to something crazy like $10,000 gold and hundreds of dollars for an ounce of silver, with real estate prices imploding at the same time, that's when you start selling off metals and buy a house or boat or something.