I am sure the people in New Orleans did not feel safe to keep their money at home and from what I saw of all the looting and stuff the cops would have stolen any money that was found. Wait That is what happened isn't it?
Well surprisingly enough, I have already found one nice coin collection while gutting a house here, I'm sure there are others that were scattered when the houses broke up. All of this was found when I pulled a ceiling down:
Almost every attic I've been able to poke around in had stuff in it. I found a box of jewelry in a different one, most of which was junk, but a few nice pieces. The coins seem to have been in a cardboard box which rotted away from the leaky roof. I never pass up a chance to poke around an attic though, I think a lot of times things were just up there so long that no one remembered them. Plus it helps that most houses have no inside access to the attics.