I believe he is referring to these guys: http://en.wikipedia.org/wiki/Winklevoss_twins. They are known to have splurged quite a lot on buying some BTC back when it was at around the ~$100 mark I think from memory, although you may want to check some older news articles for the exact time and figures. I'm not sure if their intention is to cash out big or wait for the time being hoping for widespread adoption..