I don't know where you got that idea, Pintrader, but it's absolutely, positively not true. SDC does not keep it's money in mason jars buried the garden.
It uses a bank, just like everyone else. Geesh, if that rumor ever gets out, people will be pulling up plants right and left, and then our park won't look so nice anymore. And besides....I've been sworn to secrecy so I can't say which planter it's in.