It is no secret that one of the most admirable qualities of the German public – in addition to its striking propensity for thrift in the aftermath of Weimar – is its stoic patience and pragmatism when dealing with adversity. However, over the past month, we grew increasingly confident that said patience would be tested, if only when it comes to matters of monetary trust vis-a-vis the local, neighborhood bank. First, it was the news that Raiffeisen Gmund am Tegernsee, a German cooperative savings bank in the Bavarian village of Gmund am Tegernsee, with a population 5,767, finally gave in to the ECB's monetary repression, and announced it'll start charging retail customers to hold their cash. Then, just last week, Deutsche Bank's CEO came about as close to shouting fire in a crowded negative rate theater, when, in a Handelsblatt Op-Ed, he warned of "fatal consequences" for savers in Germany and Europe – to be sure, being the CEO of the world's most systemically risky bank did not help his cause.

That was the last straw, and having been patient long enough, the German public has started to move. According to the WSJ, German savers are leaving the "security of savings banks" for what many now consider an even safer place to park their cash: home safes.

Indeed, as even the WSJ now admits, for years, "Germans kept socking money away in savings accounts despite plunging interest rates. Savers deemed the accounts secure, and they still offered easy cash access. But recently, many have lost faith." We wondered how many "fatal" warnings from the CEO of DB it would take before this shift would finally take place. As it turns out, one was enough.

To be sure, the Germans are merely catching up to where the Japanese were over half a year ago. As we wrote in February, "look no further than Japan's hardware stores for a worrying new sign that consumers are hoarding cash–the opposite of what the Bank of Japan had hoped when it recently introduced negative interest rates. Signs are emerging of higher demand for safes—a place where the interest rate on cash is always zero, no matter what the central bank does.

"In response to negative interest rates, there are elderly people who're thinking of keeping their money under a mattress," one saleswoman at a Shimachu store in eastern Tokyo told The Journal, which also says at least one model costing $700 is sold out and won't be available again for a month.

"According to the BOJ theory, they should have moved their funds into riskier but higher-earning assets. Instead, they moved into pure cash that earned nothing," Richard Katz, author of The Oriental Economist newsletter wrote this month.

 Now it's Germany's turn.

"It doesn't pay to keep money in the bank, and on top of that you're being taxed on it," said Uwe Wiese, an 82-year-old pensioner who recently bought a home safe to stash roughly €53,000 ($59,344), including part of his company pension that he took as a payout.

Interest rates' plunge into negative territory is now accelerating demand for impregnable metal boxes.

Burg-Waechter KG, Germany's biggest safe manufacturer, posted a 25% jump in sales of home safes in the first half of this year compared with the year earlier, said sales chief Dietmar Schake, citing "significantly higher demand for safes by private individuals, mainly in Germany."