Currency conundrum...and a solution!

I called my husband today from work and the subject of the PA game currency came up again. In the White Wolf system you don't get starting cash like D&D so we've been discussing some possibilities and while I haven't decided how that is going to work yet, I think I've got a currency type now that fits the setting.

I thought about pre war coins, bottlecaps, cheap plastic credits, etc. My husband suggested something else and I like it so I'm going to use it.

Gift cards.

There would be tons of them around. As people stop using personal checks or paper gift certificates, you can find these everywhere with denomination and without. I'm thinking any sort of plastic card like a credit card, club card or gift card without a denomination would be a single. Fives would be fivers. Tens tanners and so on. I'm not sure what to call this form of currency just yet but I love the idea of people carrying around all those stupid leftover plastic cards and using them for money.