I know a lot of people will tell you that you can do anything you want, but there are some limits that we have as humans. The most intelligent boy and smart guy, I suppose I could say, is just born like that. They have an interest already in learning and not only do they learn but they can apply what they learn to their everyday lives, no matter how irrelevant it is to their lives. As a guy, you can become more intelligent but I don't think a person can ever become the most intelligent boy and smart guy.
intellegence and being smart are things that you can really do very little about. they are degrees of what we're born with. but,you can seem,to most people,to be a really " smart" person. you can do it by study in a wide variety of areas. in other words just learn a lot. hope this helps