Assuming he can uniformly invest across startups (i.e. invest in quality in addition to lower quality), and adds to winners, such an approach is akin to "ensemb

Assuming he can uniformly invest across startups (i.e. invest in quality in addition to lower quality), and adds to winners, such an approach is akin to "ensemble-learning" approach. Works well for portfolios if the measure of prior performance & risks used to determine reweighting is proper and there is a high positive auto-correlation between the performance measure and future performance.