1. Builds up your credit rating. If you never use credit cards, you will run into problems when looking to do things like getting a car loan or a mortgage. |
^^^This is 100% true and by far the most important reason to responsibly use credit cards, and it applies to everyone who is not independently wealthy. I know several people who never wanted to use any line of credit and now that they are in there twenties and thirties they can't get approved for a new car or home even though they have good jobs because they have no credit history. Sucks so bad.