The points, rewards, etc.
Plus, I've found that if my debit card is compromised versus a credit card being compromised, the credit card company has been more likely to fight against a fraudulent charge because it's their money versus mine.
Plus, I've found that if my debit card is compromised versus a credit card being compromised, the credit card company has been more likely to fight against a fraudulent charge because it's their money versus mine.