For most people, two or three credit cards will suffice. Given the benefits and flexibility credit cards provide, you should own at least one that meets most of your needs. Should it not offer you everything you require, you can acquire one or more. Let’s say you can comfortably handle three credit cards. In that case, it’s wise to select them for a specific purpose - sort of like diversifying your investment portfolio. For example, you can designate one card for your everyday shopping to earn cashback, another for collecting travel points, and another to function as an emergency backup.