Just find something you're good at and give it your full attention and effort, the money follows sooner or later. If you run behind money you will rarely get it, but run behind making a career and money will come automatically.
You must be good at something where also a future market will exist. So it should be something new that not everybody is aware of now but might have a huge impact on everybody in the future.
Being good in something in an already existing market with lots of competition will not make you rich.
So you also have to be ahead of the other and take some risks.
For studies conducted in the USA say that the vast majority of rich people are heirs to large fortunes. 
