The youngest among the 400 was 30 - year - old daniel ziff , who shares a . 2 billion inheritance from his father william ziff jr . with his two brothers , ages 34 and 38 . the oldest person on the survey is 94 - year - old max fisher , who made his fortune in oil and steel . " i ' m not a billionaire , " he said 400位富豪中最年輕的是30歲的丹尼爾齊夫,他和現(xiàn)年非別34歲和38歲的兩個哥哥繼承了其父- it媒體出版業(yè)巨頭威廉姆齊夫的財產(chǎn),而丹尼爾獲得了其中的12億。