Almost all phase 2 startups will be worth zero, or nearly zero. Some will be worth $BIGNUM. If you invest in the latter, you will be rich irrespective of whether you invested at a valuation of $BIGNUM/100 or $BIGNUM/200. If you invest in the former, you will not be rich.

Moreover, whatever money you make on any startups that do not make $BIGNUM is rounding error by comparison.