The following is from Herpo's page:
"Herpo the Foul was an Ancient Greek Dark Wizard, infamous for being a pioneer the field of the Dark Arts, becoming the first known wizard to create the Basilisk, along with the first known Horcrux.
A Parselmouth, he is one of the earliest known Dark Wizards and his work is still a lasting aspect of dark magic to date. For his depravity, he was featured on a Chocolate Frog Card."
Since he's the first known Wizard to create a Horcrux, do you think he's possibly still around?
If so, do you think he may one day return to become a threat to the Wizarding and/or Muggle worlds?