Could this give bankers some sleepless nights?

So you don’t trust the banks with your money. What are you supposed to do – put it under your mattress? Well, sort of …

Now you can keep it IN your mattress, apparently.

It’s no joke, Paco Santos told the Wall Street Journal.

The Caja Micolchon, (“My Mattress Safe”), costs €875 a pop, and Santos says they’re selling well. “It’s surpassing all our forecasts,” he said, although he wasn’t as forthcoming as to what those forecasts actually were.

He certainly doesn’t pull any punches in his melodramatic marketing video, though.

Phrases like “Spanish Banking Collapses” and “People Can’t Sleep Soundly” appear over dramatic music and scenes of angry street protests.

A young man appears, approaching his Mattress Safe, which is surrounded in angelic light. He enters his security code unnecessarily slowly to see his money safe inside, as a tear miraculously rolls back into his eye.

The video concludes with the slogan, "tu dinero muy cerca de ti -- y muy lejos de los bancos", roughly translated as “your money close to you - and far from the banks”.

The company website also features a cheeky “return calculator”, where potential customers can key in the amount they deposit to see the kind of return they can expect from the mattress. That’s right – exactly the same as you put in!

Every new financial crisis seems to open up a new market for Santos. “If it happened in Cyprus, why couldn’t it happen to me?” he told MarketBeat.

"It turns out our grandparents had the right idea,” he told NPR. “Hiding their money under the mattress!"