There is no universal number of credit cards that is “too many.” Your credit score won't tank once you hit a certain number. In reality, the point of “too many” credit cards is when you're losing money on annual fees or having trouble keeping up with bills — and that varies from person to person.
How many credit cards are too much?
It's generally recommended that you have two to three credit card accounts at a time, in addition to other types of credit. Remember that your total available credit and your debt to credit ratio can impact your credit scores. If you have more than three credit cards, it may be hard to keep track of monthly payments.
Can I have 50 credit cards?
There's no limit to the number of cards you can or should have. Theoretically, you could have 50 credit cards and still have excellent credit if you manage all of them responsibly.