What have you done to become a person at full potential? Its a little silly to think that you’ll change suddenly one day. Even people who spontaneously recover from a stutter, it doesn’t just happen. Their stutter gets less and less till it’s just not an issue. It also depends on the severity of the stutter. If you have a sever stutter, I don’t know that there’s any research out there where people with a sever stutter spontaneously recover.