Drug lord Pablo Escobar once burned $2 million cash to keep his family warm while they were hiding in a cave. It is also said he lost 1 billion cash per year due to rats eating the bills and/or dampness spoiling them.

References:

https://www.businessinsider.com/pablo-escobar-burned-2-milli...

http://www.hoaxorfact.com/celebrities/drug-lord-pablo-escoba...

I'd imagine more like Scrooge McDuck in swim trunks diving into a large vault of gold coins.

Also, I doubt there's really a matress. He just sleeps on the money directly. Stacks of banded bills is probably pretty stiff vs just loose bills all piles up organically. Like each night before bed, he takes a few new stacks of cash reserves and makes it rain before diving in.