Nelson Mandela was not a great man. At least not great enough to be so admired while F.W De Klerk had his funeral protested (F.W De Klerk helped end Apartheid).
Nelson Mandela did no more besides be a figurehead and help make a constitution that no one (not even when he was in power) follows. The ANC is corrupt to this day
For the last time: the richest person in the world is not bill gates or elonmusk. The richest person in the world is some random drug lord