If i could be anyone in the world, i would be Elon Musk. This guy is the future of humanity.

First he created PayPal which i use constantly and has greatly increased the ease of online purchasing, then he sold that and now has 3 new(ish) ventures.

1) Teslta Motors. Bringing eletric cars and a charging network to the world on an increasingly affordable and practable scale.
2) SolarCity. Leasing out (free install) solar panels to homes so they are no longer relying on normal powergrid and are paying less each bill. Helping to remove our dependance on fossil fuels.
3) SpaceX. Privately run, re-usable rockets. Making space travel affordable by not throwing away the rockets after each launch. Bringing them back and cutting costs by 100 times. And with their current contract in re-supplying the International Space Station, they obviously know what they are doing. And Elon has dreams of not-too-distant colonisation of Mars too.

We need more people like this who have the intelligence and determination to see these big projects through and take the chances needed to achieve something great.