Well, can't be the most secretive given how everyone knows that they are "secretive". I'd ascribe them more to being private. The secretive are the ones that w

Well, can't be the most secretive given how everyone knows that they are "secretive". I'd ascribe them more to being private. The secretive are the ones that we don't even know exist (i.e. a google search would give very little), let alone that they are billionaires.