If you know a specific bank will go under, it doesn't seem like a wise thing to leave your money there (even though such actions will only accelerate its demise, but that's not any problem of the customer). I don't know how large the deposit insurance is in the USA, but I'm also pretty sure quite a few people don't even know such a thing exists.

Keeping it all at home is pretty funny, though (especially for burglars who will no doubt enjoy such a trend).