I don't see how not having access to the funds applies or that the stock price might have volatility since he said the money was in his bank account already.
OP called them both "stocks" and "money" seemingly interchangeably. (I don't recall the title showing "all cash" when I replied but maybe it did.) If it's actually in cash, you're totally right of course. Some people treat vested and released shares as if they were cash and look at the balance (shares times last trade), call it "money", and start making plans based on that.
