I see these all the time, obviously a scam. Seen various different versions including ones that have clearly found the email address and a password in a password dump somewhere, they then put the password from the dump in the email as "evidence" of the hack. As you also found they often set the "from" address as your own email address as further evidence of the hack, of course they are just spoofing this and it isn't evidence that they have access to your email account. (Worth remembering how easy it is to spoof a from address, don't trust it).
The sad thing that being Bitcoin, you can actually see how much money they are making from it, from BC's email alone, there have already been two payments to that address alone totalling $1,208 based on current prices. The money was then moved into another wallet totalling $7,497 (presumably from other scams) - It's a shame to see that people are actually falling for these.