No the crown prince is not the richest person in the world. Below is a list of the top 5 current richest people according to forbes.

1. Bernard Arnault - $236.6 B
2. Elon Musk - $176.9 B
3. Jeff Bezos - $133.3 B
4. Larry Ellison - 121.8 B
5. Bill Gates - $114.0 B

Keep in mind that this list may be inaccurate as company valuations change. Others could also have more money that we don't know about due to it being kept in offshore bank accounts.