Folks tend not to answer this question because they know it's not a good one.
Let's take bitpay, probably the largest and oldest merchant processing system for crypto transactions. They publish stats. [1]
- 40% of all of their transactions globally are for prepaid gift cards.
- 20% of all of their transactions globally are for "internet."
- 14% of all of their transactions globally are for "vpn."
So 75% of all of their transactions globally are for merchant categories closely associated with fraud. And the reason is obvious: it's slower, more expensive and less convenient than using a credit or debit card. So it self-selects.
Folks who "find a way to make it work" are usually ideological, in crypto (i.e. found other people who don't care that it's impractical or criminal) or have otherwise found ways of "processing crypto transactions" (i.e. using bitpay where the merchants do not receive crypto because of course they don't why would they).
