There are environmental threats to health; there are internal threats to health - genetic conditions, viral threats, diseases like cancer and Parkinson's. And then there are societal and global ones, like poverty and lack of nutrition. And unknown viral threats - everything from a new kind of influenza to hemorrhagic fever.
With a regular venture fund, you raise, let's say, a billion dollars, and then over the next three or four years, you've got to invest that money; otherwise, the people who invested with you will say, 'What are you doing? You're just collecting fees on our money.'
If I were to leave and raise a venture fund, I would have to find 10 or 100 LPs. They would all give me a bunch of money, and I would take a percentage of that to pay myself. They would expect me to invest that over the next three years, and they want that money back in seven or eight years.
If you want to invest in early-stage technologies, putting a timeframe on it does behold you to Silicon Valley economics. You've got a certain time period where you have to make the money. And you have to invest that money whether you find good companies or not.