ThreeProng
I've Got It
Being realistic, failure is extremely possible. No matter how active you are and the quality of your content, you might just be a person that people generally don't find interesting. This doesn't mean your personality is bad or anything, but there's some people I meet that just generally turn me off and you could be one of those kinds of people ( not talking about YOU in specific, using it in a broad term ). However I don't think you should start YouTube with the purpose of being successful or it'll never reach you, but rather because it's something you just have fun doing, and it'll find you itself.