User blog comment:Reverse Bill Cipher/Is Bill Cipher Alive?/@comment-25754481-20160222235405

I believe Bill isn't truly dead, because in the finale they said Stan "fully" recovered his memory, meaning Bill would be recovered as well as a memory. Basically, he's a walking apocolypse waiting to happen, but that's just my theory. And yeah, I trust myself that he or his soul perhaps could be trapped inside the stone.