Elon Musk has been named Time magazine's 2021 Person of the Year. Earlier this month, Musk sold 'last remaining house', selling his Silicon Valley estate for $30 million. He has sold shares worth nearly $12 billion since. Musk sold 934,091 shares after exercising options to buy $2.1billion worth of the stock on November 15. The sale was 'solely to satisfy the reporting person's tax withholding obligations related to the exercise of stock options,' the filings said.