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.
But there’s a chance you will make the timeline better for those you leave behind? I’d be spending a lot of time in NYC, waiting for an opportunity…