<prompt> Human: Im 22 and have been building my credit for almost two years. I currently have two credit cards, both of which I pay off in full every month: Discover It USAA Signature Visa 2.5 cash backI am an Amazon Prime member and I have been looking into getting the Amazon Prime Rewards Visa card issued through Chase, which provides 5 cash back on Amazon purchases. My question: Is three credit cards too many, specifically for someone in their twenties?  <response>: My theory is 2 is the perfect number, even though promotional advertising suggest something like 3-5. You can easily manage 2 cards.Have one card for promotional rewards points related to travelHave one card for cash back on everything else.If you already have more than 3 and can manage them responsibly that is also fine. I had 3 in my 20s but lost one to inactivity. 