Everyone is equal before death. The world’s richest man thinks otherwise. Even if they always have to die, they can at least postpone it for a while than others. Facebook founder Mark Zuckerberg’s “secret fortress” was recently exposed. This 8,500-acre compound is located on the Hawaiian island of Kauai at a cost of US$270 million. It is the size of 10 standard American football fields, covering working and living areas, self-sufficient systems, and an area of about 460 square meters equipped with explosion-proof equipment. Door to the air raid shelter. Zuckerberg, who is worth $125 billion, is not the only one preparing for the end of the world. Tech giants…