Many people already said it but I want to add on top of it and say that never do this. Buying crypto with credit card is the most idiotic thing there is and nobody should do it. Let alone credit card even if you have cash at hand you should make sure that you are fine with losing that amount before you invest it, if I am telling you to make sure you do not need the money you already have to invest then you should understand why you should not invest the money you actually don't have and buy crypto with credit cards.

You may see this as a risk that you are welcoming and "at worst what could happen" but I am telling you it is very risky and could turn sideways very quickly, maybe your investment won't go down too much but when you urgently need money crypto is not easy to get your hands on and you will want to use your credit card for it instead.