I pay rent, computer hardware, airfare, electrical bill and similar. I don't have a mortgage or own a car currently, but if I did I'd settle those expenses with crypto easily. The recipient has no idea, they receive bank transfers and see no different than any random person. Crypto also funds the credit cards I use to pay services such as AWS. (And day to day Uber, grocery delivery and that sort of thing too)

I pay as much as possible with cash as in paper bank notes, but those are also almost entirely crypto funded.

I do not use regular CEX (centralized exchanges) at all as on or off ramps or submit to any KYC for any of this.. that said I'm definitely wouldn't be able to remain anonymous if I were to do anything grossly illegal with my funds.