Correct me if I'm wrong, but money is nothing more than an IOU. The money on your hand, is equivalent to the value in which you owe others for their favour and services.

And do you know, the US is in trillions of deficit, and is inherited by the current generations of Americans?
Do you also know, the government buys money from the federal reserve/central bank (which prints money), and gives IOUs (aka bonds) in return for the money they got (created from thin air). The interests charged on the government can only be paid back by borrowing more money from the federal reserve/central bank, which incur even more debt in interests (plus compounding), hence the great debt US is in right now.

Also, a small percentage of money exists on printed form. Majority of it exists in digital form.