Hey so fairly basic question. You find out string theory is correct, there's infinite time lines many of which have some version of "you".

You're offered the choice to extend your own life span by 20 years, but it will kill every other version of yourself.

You're never going to be able interact with any time line other than this one instance, and they're not going to affect you at all.

Assume there will be no repurcussions to you personally other than the knowledge of what you did. Would you do it?

If not... What if you also found out you only had a month to live, this would give you another 20 years on top of that. Would you be consider it then?