Definitely not. Richie Rich is a product of creative imagination. There's no real-life basis for it. The story is crafted to provide entertainment and fantasy to readers/viewers.
First, decide on the character's personality and style. This will guide your design choices. Use references from various sources to get ideas. Pay attention to the body language and expressions to make the character come alive on the page. Also, don't be afraid to make mistakes and keep refining your drawing.