I already knew that from youtube videos such as this one:
https://www.youtube.com/watch?v=LkM1mcdcLEII don't believe he's so rich though. It may be just a fake propaganda. There are men like Bill Gates and Jeff Bezos who may be richer than him...
I agree with you. Surely he is not the richest in the world. And if this is so, then it is more important that he is the president.