If I could earn a living doing what I loved the most, it would be to stop people hacking into major systems. It is becoming more prevalent that more and more people are becoming remotely hacked on their laptops or other devices. There have also been stories that people have been able to hack into baby monitors to scare the child or the parents of said child. It would change the world because people would become more secure with their devices.
In order for me to make my dream turn into reality, I would have to understand computers, study them, take classes, and really understand why people hack, whether or not it is just for fun.