Ever thought about printing money at home?
It’s illegal, right. But think about this idea:
Your printer driver is connected to, say, PayPal. You draw some cute image (or use your cat if you can’t draw or the Internet, it’s full of cats). You create a QR code worth $15, slap them together with gimp and go to spend it.
Everyone has a mobile phone, so checking those codes would be no big deal. Just an app and you’re done.
And the best part: The NSA would know all the time where you are! You’d never get lost! When they notice you stopped spending money, they could send you an ambulance!