I tried to pay something with Bitcoin instead of debit card a couple of years ago. The transaction took ~4 hours to clear and that's with fees totalling about 40% of the amount. Granted the original amount was like $10 but still way too slow and way too expensive. I understand that technically credit cards are not instant too, but there's an intermediary that guarantees that the amount has been reserved until the bank clears your payment. I wasn't expecting Bitcoin to be instant but 4+ hours is excessive.

That's 2-3 years ago so my experience might be outdated.