So basically you're just playing semantics now. You use a debit card for purchases online or otherwise via card. It sounds like a lot of the people here use a credit card for those purposes. So, where's the downside to the credit card if you use it like many seem to, and only spend what you actually have available and pay it off each month. Then it functions, debt-wise, just like a debit card, but with the extra benefits of being able to dispute as well as the benefits listed by PhotographerMike above me. Also, when renting a car, many rental places will place a hold on the card for the amount of the rental plus an extra $100-150 security deposit. I used to work for one, and that's what they did. If you know you have the cash for your rental but kinda would like to have access to that $150 extra while on vacation, a credit card is great. You put it on the card, have your fun, come back when you're supposed to and then pay cash or by debit card at the end if you really don't want to have even a momentary balance on the card.