Remember when Woolworths was still in business, had a lunch counter, and served meals at a decent working man's price? I do, just barely.
$5 would buy the entire left side of the menu. Think bout todays prices for the same items. This is why you shouldn't hide money under the mattress or in low risk, low return bank accounts. This is why your money needs to grow with the economy, pick up the price inflation built into stock returns. This is why you need to invest in stocks and bond, and not just stick with "safe" bank accounts and money market funds.