Interestingly, it just occurred to me that VC is the exact opposite of this. Many VCs have called 176 of the last 8 unicorns. You can still make bank doing this though.
VC's put "early investor in Google and Uber" on their bio, not "passed on Series A Facebook because MySpace has already won the social media war, then begged to be in the last funding round before the float".
yeah you don't actually have to get that many right when the winners return 750x
But if you do get the 749th right - you can live off that reputation for a long time.