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When investors saw his $ 160 million all - debt investment turn into a $ 440 million asset in just a few years - - his net worth took a similar , though even less gravitationally - bound arc , rising from $ 2 million to $ 75 million durign the same time ) they all rushed in .
 investors, his, his, they all
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 investors, his, his, they all