Réponse:
Should we tend to become immortal? well it seems to be a great opportunity. You get to live all these lives, and get to see how the world will turn out to be.
you stay for ever young, and enjoy life to the fullest, never be sick or die in any manner. But the downside of it is that you will see all the people you love die, you will end up by yourself. your whole family gone. I don't think as a human being your mental will survive, too much pain.
Also, what would be the purpose of not being able to die? seems completely crazy, forever Young won't get you happy or rewrite your life. The world would change but not you.