Future. Who is to say that if I pick fantasy, I won't end up being some poor peasant shmoe? Conversely, even today a poor peasant can rise to become pretty rich - sure, it takes a lot of hard work and a bit of luck, but most of the obstacles come from circumstance, not overt oppression. Further into the future, even the poorest people will look incredibly rich by today's standards. Eventually we will have such technology where nobody has to work to survive.

Short answer: The future, because it will look like The Culture.