Do you believe that an eternal youth pill will be developed in the future?

A pill that could keep us in our 20's or 30's forever. Mind and bodywise. I would say yes. And I am guessing that it will come within 100 years. And for a long long time, only the rich will be able to afford it. The poor will simply get old, get sick, and die. I know, this sounds all gloomy and doomy. But in all honesty, I can definitely imagine this happening in a world of haves and have nots. This could replace plastic surgery altogether. The vanity kind. Not the important kind of plastic surgery when someone's body is burned over 90% or when someone face is blown off in war.