Rules:
- History of the world before your birth remains the same; only events happing after your birth can be changed.
- The other version of you must still be alive, you cannot go to a world that you are dead in. (This essentially forces you to murder/abduct your alt-self, so travelling has a ethical cost to it 😉)
- There may be other multiverse travellers out there
(Btw, is it ethical to murder an alternate version of your self? Is that even murder or just self-harm technically?)
Knowing my ass i’d just go to meet another version of myself to have another set of eyes on a problem/subject to study that understands my twisted way of thinking. Fix that problem and then leave.