What makes money trustworthy?: John Stossel

Look at the dollar bills in your wallet. They say they are “legal tender for all debts.”
But are they? What makes them valuable? What makes them worth anything?
Each bill says, “In God We Trust.” But God won’t guarantee their value.
The $20 bill depicts the White House. Congress is on $50s. But neither guarantees the value of our dollars.
I wouldn’t trust them if they did. I don’t trust politicians, generally, but I especially don’t trust them with