In regular trading shares don't go to or from a company but rather changes hands between investors, so BsH selling off won't affect their cash reserves (unless

In regular trading shares don't go to or from a company but rather changes hands between investors, so BsH selling off won't affect their cash reserves (unless it's part of an IPO, funding round or buyback). Looking at the article he's probably feeling that things are overvalued in general and is building a war-chest to scoop up stocks at a discount after a slump or crash.