I don&#x27;t think he is a fool but I do think it&#x27;s about him; he wants a longer life and his prior investments throughout his life pointed to that. He survived the heartattack age and no dementia so far, so chances are cancer will get him are high (you have to die of something). Indirectly he already invested in cancer prevention by investing in research to aging etc. Those weren&#x27;t spectacular amounts either so either it&#x27;s just something he feels he owes himself or maybe he has managers that go about it smarter (like the PhD example). I don&#x27;t know the guy personally and it&#x27;s great he is putting money in this but he is doing it for him i&#x27;m sure.<p>Edit: like the other comment &#x27;Larry Ellison has cancer&#x27;; that&#x27;s exactly the reason he would do this...