Most people have to work real hard to get rich, and its not something that is just done over night. First of all, choose an occupation that will result in good income, and more importantly a buisness that allows you to continusly making progress, and by doing so increasing your income. Studying is not a must, but its the way for a lot of good job uppertunities out there. You could always work yourself down form the bottom up to the top. A lot of successfull people have done this.
What really makes someone rich and successfull is their talent! That is if you HAVE any talent. Because if you do, and your working really hard to improve on your talent, success is guranteed in the future. You might be a terrific singer, a good athlete, a superior actor and so on...
Other than that, some people are just born into wealthy homes and take off from their parents buisness and richness like for example, Donald Trumps kids... In other words, people are just lucky!