Allow the diversity to exist. There is nothing wrong with it. Hell, we put up with the religious right-we can put up with transgendered human beings.
Gather in your resources, rally all your faculties, marshal all your energies, focus all your capacities upon mastery of at least one field of endeavor.
I myself believe that there will one day be time travel because when we find that something isn't forbidden by the over-arching laws of physics we usually eventually find a technological way of doing it.