Money...I need it sooooo much.?

Now I'm not sure if everyone is illuminated to this fact, but, money is worth nothing in all literal truth. For example: If I wrote one dollar on a piece of paper would you accept it being as it is my currency? All money is 'a big IOU' that people are finally wanting to cash in. Back in time how money got its start was that people would take their gold to a blacksmith and trade a piece of paper that said it was worth this much and was redeemable at the blacksmiths so that instead of carrying around a bunch of gold they could pay for their food etc. Soon the blacksmith realized, "These people aren't coming back." So he kept signing out notes(or IOU's as I term them) when he didn't have any gold to back them. My question is simple, What is my money redeemable for today...if anything?