This is a huge leap to peg her at zero. She might have taken some money off the table in a round. She might have used her stock as leverage with a bank to inves

This is a huge leap to peg her at zero. She might have taken some money off the table in a round. She might have used her stock as leverage with a bank to invest elsewhere, making a decent return on it (though potentially leaving her over-leveraged if the banks call those loans). If you've got a billion dollars in paper money, I don't see it as far-fetched that you could turn that into a few hundred million of cold, hard cash with some basic financial advice.