Just gotta fold a piece of reality over the amulet and… done! It’s completely illogical, but it’s also the perfect hiding spot. Because only those who can warp reality to their whims can reach it. And I can say for certain there’s nopony like that around.
That’s why Twilight said evildoers. Pinkie ain’t evil silly!
Though I suppose you were responding to the bottom text. Still.