The answer is simple. If you look at the world around us, you'll see that many of the people who have made their fortunes have done so without having any formal education beyond high school. When asked why this was the case, many of these people said that they were able to learn through experience, and that when they had a goal in mind, they would do whatever it took to achieve it.
For example, one man who made his fortune through real estate investments began buying up properties when he was only fourteen years old. He bought these properties from his parents' savings accounts, which were managed by his father. By age twenty-one he had been able to accumulate enough money for his first big purchase: an apartment building on Main Street (which later became known as "Main Street Mall").
He continued buying more property throughout his life until he retired at age sixty-five with a net worth of $200 million dollars (USD). He said that he never went to college because there weren't any jobs available for people without degrees at that time; however, he still felt confident enough in himself to pursue business ventures without any formal training whatsoever.
This post can motivate you, but the aim is not to encourage illiteracy. In everything you do, try to be educated.
