It is all about the Benjamins.
The amount of U.S. dollars in circulation today is valued at $1.1 trillion, the highest it has ever been. That’s an increase of about 9% from last year, and it’s been climbing steadily for more than a decade. But that uptick in available greenbacks does not necessarily mean the country’s appetite for cash is growing. About 75% of that value is in $100 bills, which says little about the use of cash for everyday purchases, usually carried out in smaller bills from $1s to $20s. (The Federal Reserve calls these small bills “transactional denominations,” as opposed to “store-value denominations” — the $50s and $100s). ~ Fortune.com