<prompt> Human: Since 250k is the limit on FDIC insured money in a savings account, where do billionaires keep their savings in a way thats safe?  <response>: In the words of Ron Whitey from futurama: my caddies chauffeur informs me that a bank is a place where people put money that isnt properly invested. Youll basically find that most of it is going to be tied up in various holdings: real estate residential and commercial, public stocksbonds, private equity i.e. venture capital in various forms, probably some hedge funds, maybe some life insurance products.There are some more interesting limits where people start doing slightly more interesting things with their money. Specifically, once you get above 5M-ish in the US youre going to be subject to estate taxes aka inheritance tax. Many rich folks will take steps to avoid these taxes: charitable trusts, life insurance trusts, etc. So, its likely that some of their wealth is in the form of a trust which is then holding the above assets.Its also pretty likely as you get wealthy enough that youll have a financial planner or group of them either hired independently or through a big investment banker to manage your assets. Youll tell them your riskreward tolerance and theyll put your funds to good use for a cut.So, short answer: not a bank. :D 