In a total collapse, people might accept silver but I'm not sure constitutional silver is going to do you any good. The average person can't tell the difference between a silver quarter and the silver plated coins we have today and even if they can, what makes you think anyone will trust it more than the money that just collapsed? Sure, you can make arguments all day long but I'm not sure it's a sure thing as it's still just symbolic and has no real use in the day to day. On the other hand, gasoline, food, ammunition, and medicine are useful in any scenario. My first gut reaction is to figure out how to create antibiotic ointment in my basement as this would be a very valuable skill. This, however, only works in a stationary scenario where people trust or can see that your antibiotics actually work and you're not selling snake oil. Hundreds of pounds of food is also problematic if you're on the move.