Alright, I'll give you the only non-grumpy answer here apparently, from someone who actually knows him.

His name is Jimmy. He loves YouTube, and want to make the best videos possible.

He lived with his mom and brother in his childhood. No mention of a father. He played a little baseball, and besides that he really just wanted to make video content. The family was not rich.

His first brand deal he got, he received 10.000 dollars from a sponsor. He gave it all away to someone and filmed it, gaining another brand deal that then got better and better because he gained more viewers.

The concept today for almost all of his videos is "game show". Which means you almost always have a chance to win money. Sometimes he also just gave it random on the street.

He also is a part of Team Trees and Save the Ocean, doing some environmental work in his videos.

Now, Jimmy aka MrBeast has a philanthropy channel, where he hired two individuals to go and give money away around the world to poor villages in 3rd world countries.

He also sells chocolate from sustainable cocoa farms, that is also gentle to the stomach (Jimmy has a stomach disease, don't remember the name).

So yeah, that's MrBeast. He uses all his time and money on videos, and he himself live in a little bunker close to the film studio. He owns almost nothing for himself, but he does own the biggest YouTube brand there is.

Hope it helped.