system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] Why didn't Dumbledore use the Fidelius Charm to hide the Philosopher Stone?
gpt
A. Didn't work so well the last time

B. He was suspicious that voldemort was still alive and wanted to lure him out of hiding. He knew the philosopher's stone at hogwarts would be too tempting to pass up. 

Ultimately dumbledore is kind of an asshole who orchestrated the events of the books as much as Harry did. He had part of the prophesy and knew about horcruxes and suspected that Harry would need to kill Voldemort by sacrificing himself.