Are you trying to tell me that Bill Gates doesn't have millions of dollars in various bank accounts?
[edit]In fact, I'm going to challenge you. Find a citation that backs up your argument. I don't doubt that it's out there, but I've actually never seen any hard evidence that rich people invest the majority of their money. It's an assumption we all make, but it's one that gets spouted by Fox News on a daily basis, which innately makes it something I'm inclined to doubt.[/edit]
Challenge accepted
http://www.gurufocus.com/StockBuy.php?GuruName=Bill+Gateshttp://investing.businessweek.com/research/stocks/private/snapshot.asp?privcapId=100912http://www.forbes.com/sites/gurufocus/2013/02/14/latest-picks-from-bill-gates-foundation-buys-ko-pg-wmt-sells-costco-csx/http://techcrunch.com/2014/01/10/bill-gates-not-the-next-ceo-of-microsoft-but-his-vc-investments-are-picking-up/So based on the above info, he has significant amount of stock shares in:
McDonald's, Exxon Mobil, Caterpillar, Wal-Mart, Berkshire Hathaway, Coca-Cola, Procter & Gamble, Cascade Investment, Willis Group Holdings PLC, Signet Jewelers Ltd, Autoliv, Inc., Orbotech, Ltd., sells Costco Wholesale Corporation, CSX Corp, Expeditors International of Washington, Inc., Cemex, S.A.B. de C.V., Comcast Corp, The Greater China Fund
As of 12/31/2012, Bill & Melinda Gates Foundation Trust owns 26 stocks with a total value of $16.8 billion.
"Last year, Gates was involved in at least six new and follow-on investments in venture-backed companies, including a commitment to the energy storage technology developer Aquion, in a financing which wrapped up earlier this year. That’s up from four new and follow-on commitments in 2012"
"Rounding out some of the newest investments in the portfolio of the man from Medina, Wash. are three healthcare investments focused on computational drug design and targeted cancer therapies: Nimbus Discovery and its development partner Schrodinger Inc. are both focused on computational drug design, while Foundation Medicine develops diagnostic tests based on gene sequencing to identify personalized cancer therapies for patients."
EDIT: I forgot to mention his biggest "investment" Microsoft Corp. where he still has a very significant ownership %, so most of his "wealth" is still in the form of MSFT shares, the above mentioned other investments are from money he earned as salary and made by selling some of his MSFT shares to diversify his portfolio in case MSFT goes down.
He is still the largest single shareholder of MSFT:
http://finance.yahoo.com/q/mh?s=MSFT+Major+HoldersAccording to the Feb 18, 2014 statement, his shares in MSFT are worth ~$13.6 Billion.
If you add up the above mentioned $16.8 billion in other big companies plus MSFT, thats $30.5 Billion and we don't know the figure of all the smaller start-up investments mentioned in the other article, but its already clear that the majority of his "wealth"