The harm here isn't that he invested in startups, but that it's become such an insanely high profit that's now entirely shielded from taxes. What would preventi

The harm here isn't that he invested in startups, but that it's become such an insanely high profit that's now entirely shielded from taxes. What would preventing startup investments accomplish that a simple cap on shielded gains (let's say 10 or 20 million) wouldn't?