Whereas the chance you could actually build a company with billion dollar valuation is probably well under 1:1M. Just from being in the pool of startup school attendees or auditors. There are additionally many other factors which could substantially increase those odds.
Also, would just like to mention the recent podcast with Laura Deming of Longevity Fund was excellent. Incredibly informative and reasonably optimistic about the probability of a breakthrough in our lifetimes.