Also, I have to point out that, like the "pigeon drop", this kind of appeal to VC's relies on their greed overwhelming their skepticism. If you really, really want it to be true (that you are about to get much richer), it's easier to convince yourself that it's true. Which makes it even easier for the one gaming you to be convincing; they really just have to get out of the way an allow you to convince yourself.

If you're not desperately trying to convince yourself that this is an opportunity to make a lot of money, it's not so convincing.