Real scenario: you wouldn’t see that happen.
Hypothetically it could cause economic collapse because now there wouldn’t be money to back up all the loans that are outstanding. Followed by mass layoffs of people and all the other fun stuff that comes with it.
Anything that doesn’t require high tech still works really well. Don’t need to worry about tracking software that tries to sell you something with say a horse or two. And as a bonus you get lots of physical activity as well which is healthy.