What do you think of the U.S. monetary system?

I honestly think that in the future our economy will collapse because of how our monetary system runs. Our currency is not even backed by anything. We literally create money to pay for debt and then have to continue to make more in order to pay it off. This will probably cause a very big inflation. I think if we actually switched to something like bitcoins it would stop a lot of these problems. Obviously this is all speculation, but what are your guys thoughts?