As per Google search these are the top 3 richest person of this world.
1.Jeff Bezos $108.9 billion
2.Bill Gates $91.9 billion
3.Warren Buffett $90.1 billion
But these maybe wrong since in this world there are lot of blackmoney is available which were not recorded by any governments.
In my opinion the politicians from the third world countries can be in the richest persons because they were stealing all their country's taxes.
That's true and history can prove that we have seen so many dictators in the past amassing riches and plundering their countries wealth, they are good at it hiding their wealth because they control everything in their nation, the military, the business the senate and congress.