If a general bank has three types of cards, theoretically, the maximum number of credit cards that a person can handle is more than 144.

Even if you have a 144 credit card, it doesn't mean that the credit card limit has the superposition of 144 credit cards. Because for most banks, no matter how many credit cards are processed, the quota is shared and limited to the one with the highest quota.

Handling too many credit cards will take up your credit limit.