When, if ever, do you think our society will crumble and the dollar become worthless?

I keep hearing that, by next month of September, some earth-changing, horrific thing will happen and we’d better store a lot of dehydrated or any other kind of food now! I’ve heard eggs are going to six bucks a dozen and my daughter is considering buying a chicken coop. Grocery prices are skyrocketing and people are stocking up on Spam.
Do you believe anything drastic will happen soon and are you preparing in any way for the grid going down? We have three buckets of dehydrated food and that’s about it. I’m frankly worried about it. I don’t know if I can even trust my bank anymore. I realize a lot of people are scoffing about all of this and are feeling cozy and confident in our future.