While I don't disagree with the general statement, I do want to add the nuance that this isn't true for small amounts of cash money. Recently, the government even recommended people to keep more cash on hand in case of emergency / large scale disruptions to the financial system.
Even with large amounts of money, it's not like they're knocking on doors, looking under yer bed.
Even with large amounts of money, it's not like they're knocking on doors, looking under yer bed.