If you want to get wealth you need to change your beliefs of everything.
First is beliefs, If you think "little me who i am" then you never get any wealth.
90% of your reality results of your beliefs system, that's why it's easier for soneone who been around wealth and seen good things to imagine that he or she can have wealth too.
On the aspects of beliefs I would prefer you say mindset because it doesn't matter what you belief but in most cases the mindset works as far as to guarantee you success in what you are about to step up with, in other words your mind have alot of workings inside to give you a thrilling outcome, cause when you think low you'll definitely go low but when you think big and high that will be the outcome irrespective of your belief, but when you talk about believe i think alot of people believe in so many things but is the mind that necessitate one's step to riches.