Bank processing through crypto?

Question

Cryptocurrency

Hello. Against the backdrop of recent news about the suspension of Visa/Mastercard cooperation with the major adult project Pornhub, a fixed idea has appeared that I want to either dispel or find ways to implement.
And what if for "problem" projects with which large processors refuse to work, create some kind of "payment": for end customers, everything looks the same as before - he pays with his bank card. But for us, we essentially buy cryptocurrency for this payment (for example, our tokens on erc20 or waves), then we convert them to a crypto exchange and from there we sell them for fiat to a settlement account in a foreign bank. From there, we also pay in favor of our customers.
These are essentially abstract thoughts on the use of crypto.
Tell me what could be wrong here, here, rather, legal processes will make up the whole complexity.