According to various studies and world inequality report 2018, large portion of world's wealth is concentrated in the hands of small portion of population, while the bottom 50% holds less than 2%. This distribution of wealth is highly unequal and cause of concern for many people, as it contributes to social and political unrest all over the world.
Well, I think that those statistics may be partially correct, but I think that there is quite a wide world population that has more money; maybe you, we, the media, or the government did not just know them all because they just chose to stay anonymous. Why I said the statistics may be partially correct is that, normally, we have a lot of poor people and middle-class people because there are a lot of lazy people who usually give up for principal that can earn them a lot of money, which is why some people too end up working for a company or the government all the days of their lives and receiving less than $300 per month. So, the number of rich people is supposed to be less than the middle class and the poor because there are only a few (lot) of them who are breaking the principal to make wealth, but they are more than 20% based on your topic. There are quite a lot of richer people worldwide, not just Elon Musk, Bill Gates, the CEO of Apple, the Facebook CEO, and their likes. What of the Hollywood super starts, Bollywood super starts, Nollywood supper starts, all the supper starts musicians, and some supper starts comedians? What about those bitcoiners with thousands of bitcoins in their wallets, what about the drug cartels... There are many rich people worldwide; just that, some are in disguise for some possible reasons best known to them.