Stipulations:
- You cannot die and are immune to disease
- You cannot alter the future such that you change the world from your point of origin. i.e. You cannot become so famous that future people recognize you as immortal.
- If you vary the timeline too much you will cease to exist.


Kill Jimmy Savile, John Wayne Gacy, Ted Bundy, Epstein, so on.
Then you don’t survive, you cease to exist
Like for real or because you became a killer you lost your humanity?