Bitcoin is so much faster than a credit card transaction that it's not even close. A lightning transaction is near instant, regular bitcoin transfers take in the order of 10 minutes. Credit card transactions take weeks before you get the money, and after that the money can be yoinked back for a multitude of reasons beyond your control as a merchant. The fees are often lower, too. Bitcoiners are for some reason opposed to solving that last issue (no privacy) despite the technology existing in monero. NIH syndrome, I guess.
The real unsolved issue for cryptocurrency is between chair and keyboard. People make mistakes, people are afraid of being robbed. Your average person does not want to be their own bank. You can have a bank or payment processor manage your money for you, but then we're back to the regulated world where Visa and Mastercard can determine what games you're allowed to buy.