Where are the filthy rich keeping their money as others accounts are only insured for 100k to 250k?

Where are millionaires and billionaires putting their money if they were to take it out of banks and stock markets and other commodities? Are they keeping it under their silk pillows or is their a secret fund they are putting it into? 1 Trillion dollars was taken out of the market today and it didn't all go into gold, so where is it gonna go?