I've received around a dozen of these, all with different bitcoin addresses. All of them came from a Linkedin breach a few years ago. (I know that because I use

I've received around a dozen of these, all with different bitcoin addresses. All of them came from a Linkedin breach a few years ago. (I know that because I use different email addresses and passwords on every site, and these all came to my Linkedin-associated address and claimed to have stolen my [unused for years] Linkedin password.)