Oh my.... Another ignorant post.
So - I have a question for you, young lad. Do you think you will NEVER be a billionaire just because you're deaf?
Becoming a billionaire is very difficult as is, and becoming one as a Deaf person is certainly much much much harder. There are very few billionaires who speak speak lesser known languages. ASL is similar to English, and many Deaf people can read english, that's not enough to facilitate direct conversations with your customers. Is it possible? Sure thing, I just don't see the Deaf community producing many billionaires given its current circumstances and lack of emphasis on top notch education. There's only a handful of deaf/Deaf students in top schools, and most of them are not economics/business majors.
^Whoever mentioned having wealthy parents, that is a good point, and that's why I excluded billionaires who are wealthy by blood association.