A good and honest opinion for 2017. But probably not for 2050. You see, vision is something you go for the long haul, not a couple decades. The world will evolve a lot, specially in the sense of using Space, Moon and Mars as the foundation to colonies.

One thing i do believe is the possibility to mining space (specially asteroids, like this -> "NASA to explore asteroid made of $10,000 quadrillion worth of metal", google it).

I imagine SpaceX and Blue Origins playing a huge part (if not all) in the future of this kind of exploration.