<human>: Can you provide a brief rundown of the text in within 3 sentences?

Ok, so let me preface this question with a broad overview. People own credit cards which are forms of potential debt. They charge these cards with cash they (hopefully) have, or cash they don't have currently. It is done by everyone in one way or another whether the medium is a credit card, bank loan, or any other general liability. 

I can't find any solid information on this topic relevant to my question which is; does the world physically possess enough money to equate its debt. For example, taking the entire world as a whole, if you were to compare the cash to the debt would it even out? I formulated this question through thinking about how recently it seems nobody ever has physical currency on hand. I for one never do. I always swipe my debit card and keep everything electronic. Which eludes to another topic. Is our money still backed with value? 

Not sure if I am asking this question correctly. Hopefully someone can enlighten me though.
<bot>: Does currency truly still have value? Or, has it become an empty transfer of paper with dead presidents stamped on the front in exchange for goods?