There is a way around this. First, you might be limited as to how much silver you can get. It only takes around 3 toilet papers to buy a silver dime or 7 for a quarter. While that is not very much, any is better than none.
Another thing is to look through your small change. You have nickels? Keep them in a safe place. Those things could be worth a small but reasonable amount of wealth in a collapse for their metal content. A roll of nickels costs 2 toilet papers today (face value), but they cost the mint more than that to make. Your pennies are worth checking. Any pennies before 1982 should be saved. If you have any 1982, or certain Canadian pennies before 1993, tap them lightly. If you can get a clean ring even once, they are copper and should be kept. The newer ones cannot ring cleanly. Those are not worth much, but even the zinc could be better than nothing.
If your parents allow, you might be able to learn a barter skill. Do you know how to fix things? Are you able to build basic items out of wood? Do you know how to run a computer and fix one, even though electricity might be sporadic? (Yes, people are going to use them while they still have electricity.) You can find whatever you think might work for you.
Also if your parents allow, starting a Sun square NOW is a good idea. Do not wait until the Sun enters Virgo--August 3 is a great time to start it. August 10 and 17 are also good but you have to watch out for void of course moon. You might do the physical square affirming large amounts of money and wealth coming to you, independent of the coming financial collapse. August 24 is too late, since the sun is then in Virgo--it will be in Virgo before you finish, but it is when you start that the Sun must be in Leo.