No, because I try to live the best life I can for myself already. To do that, I must pursue my own rational self-interest. It just happens that pursuing my own rational self-interest also benefits others. I think that's true in most cases. Otherwise, what you're doing is self-sacrifice and I think that's evil.

My purpose is not to make sure that future humans survive. My purpose is to live my one life to the fullest to the extent I can. There is no moral duty beyond that (of course, having children would impose a moral duty, but that is a separate issue and a reason people should choose only after deep reflection).

It happens that I value humans greatly and already want them to thrive, regardless of whether or not something more intelligent exists. So to answer, I already am. Humanity itself is already enough for me. I wouldn't forsake it just because something else exists.

Read The Virtue of Selfishness by Ayn Rand. She makes a lot of good points on this topic. 

 😎