Under a mattress, in the freezer: Why so many are hiding cash

CNBC reports:

Where to stash your cash? Some Americans are sleeping on it—literally.

While banks are still the go-to solution for most consumers, 29 percent say they're keeping at least some savings in cash bills and coins, according to a new survey of 1,820 adults from American Express. Of those holding cash savings, 53 percent are hiding it in a secret location.

Millennials are even more apt than other generations to go the mattress or freezer route, with 67 percent of those saving cash saying that they hide it outside a bank account.

"We've long asked people about how they've planned to keep their savings, and for the past few years, we've seen an uptick in people saving cash," said Kimberly Litt, public affairs manager at American Express. This is the first year the company has specifically asked Americans about tucking away cash.

The survey also found that about 1 in 4 consumers anticipates a financial emergency this year, and hiding cash at home could be one way people are preparing. "I've also heard of people using it as a budget technique, keeping cash in envelopes set aside," said Litt.

With ultra-low interest rates , you can understand why many people don't have money in the bank. To them it's pointless.