If in the US, there is almost no downside to credit cards as long there's no annual fee and you pay it off in full every month. Most credit cards have some kind of rewards like cashback, miles, discounts, etc., so you gain something from using them. Banks are also very strict with fraud (because it's their money you're spending), so they will most likely side with you if you file a claim for unauthorized purchases. If you used a debit card, it's your money that gets stolen; and while the bank will try its best to recover it, they have less incentive to work for it compared to a credit card.