Most of Musk's net worth is held in stock. You can sell stock, but then you have to pay taxes and relinquish ownership rights that those stocks grant. So he mi

Most of Musk's net worth is held in stock. You can sell stock, but then you have to pay taxes and relinquish ownership rights that those stocks grant. So he might have had to sell ~$20B in stock to pay that extra $13B.