I also received a similar email a few months ago, but it was in Russian instead of English and suggested using Google translate. However, it wasn't containing any of my passwords; it was a simple threat demanding $1000 in Bitcoin. Ignore it and move on; change your passwords and secure your Bitcointalk account, which is vital. I've also used the website haveibeenpwned.com and have suffered plenty of leaks. I've changed my password multiple times, but my email is still being targeted. Is there a way to save it, or should I just dump it?
if you change the password then you are safe from the threat, so it's better to block that user's email so you won't receive that message again, but if you feel worried about the threat then it's better to replace the new email and ignore the old email if There is no important account associated with that email, I don't care about any threatening messages in the email because if he managed to hack my account then why didn't he just steal my balance without begging to send $900 to his address.
Of course and I've changed the password, however, it's practically impossible to change all passwords that are associated with that email. I've stopped using it but it's still associated with a few important websites, such as Bitcointalk, Steam and a few others.
If your email address got into these spam databases, there is no way to prevent getting such kind of messages. If you really don't want to get it, only option is to dump that address.
That's probably the wisest option; however, it's almost inevitable to prevent your email address from being found in such databases; even my newest one is in a few leaks, and trust me, I'm being quite careful with it and not using it on random websites.