Bitcoin was as created to resist censorship— hence Wikileaks was able to raise money after visa et al banned them. It was created to resist debasement- as a result it maintains its value as inflation ramps up.

Thus you would actually not want to buy things with bitcoin, and instead spend rapidly depreciating USD.

That didn't answer my question at all.

Ransomware is the other big area where bitcoin is used for payment.

This I suspect is a large(st) use case, also NK (others?) may be using it to circumvent sanctions.