Surely you’ve received this one, right?
This is where the SCAMMER/SPAMMER is trying to build their bitcoin balance by scaring you into believing they have commandeered everything on your computer and now have video of you doing unmentionable things. Pay me or I tell everyone you know and share those nasty videos.
This one does come with a valid WARNING – DO NOT click links in emails that came from someone you don’t know. That is a TRUE way to get viruses on your computer!!