This is pointless. If the economy completely tanks and never recovers, all of those bank notes will be worthless.
We have been using plastic over cash here, mainly because the cashiers we know seem to be happier when we do. On the other hand we have stocked up on small bills, $20 and under just in case. Spending a $50 or larger is a pain at most of the places we shop and the bulk of smaller bills is no problem for us.
When you think about it, there's approximately $200 physical US dollars in circulation for every person on the planet, making it one of the rarest commodities of all.
Noobs. Sheesh. I've been cleaning out cash and trading it for gold. With the FED printing as furiously as they have been of late, your cash will be literally worthless. Cash loses value. Find something that doesn't!