Here is where a lot of the ultra rich put their money. Parking the money directly with the United States Treasury in an account backed by the taxing power of the United States government. They can buy short-term Treasury bills and keep rolling them over until they need the money. Unless the United States goes bankrupt by hyper-inflating, they are safe. Buffett literally has tens of billions of dollars of Berkshire Hathaway’s money parked in Treasury bills, bonds and notes at times. There is no risk of default or bankruptcy unless the entire nation goes bust! Physically holding cash in multiple currencies in safe deposit boxes throughout the world. These aren’t insured, though, so there is that risk. Yes sir that sure will help "expand" the economy.