Worrying where it will come from is never going to be a good idea, worrying in general is the worst kind of visualization. Dying from starvation is not really realistic in any western country, many will even stop you from doing it by your own choice. Money is not how we survive, you can't eat money or build anything worth building using it. All it takes is a slight disruption and it's paper with funny faces on and digits in a computer that doesn't run anymore.