Then why are they interviewing? Taking people at face value until you know you shouldn't is an important interpersonal skill. Second guessing what people tell you is pointless. This would be one item in a list of his experience, not what you see first.
Now, if in the course of a phone screen, you described yourself as such, you'd probably get a chuckle from me.
I would think it's fun little icebreaker if you are applying for a position making cute iOS games.
However if you are applying for a position developing power-plant control systems it's a bit inappropriate.
The goal should be to build a great product, company and reputation. If that makes you a billionaire, that’s fine. Most likely you will achieve this goal but not the billionaire status.
I recommend against attempts at humor front and center like this on a resume. It’s too early.
I’m in a serious mood trying to solve a serious problem when I’m reviewing resumes. This would fall very flat with me. I would not think you were serious about finding work.
Sneak in some humor later and it might work. If I’m interested enough to read the details of your resume, something humorous later on might get a chuckle out of me.