Would that be better I wonder? That way if a caged gerbil shooter stops you and asks if you have a bunch of cash on you, you can legally say no, considering it's illegal to lie to the lying POS SOBs. And I suppose if you see one of those vile creatures in your rear view and you do have a cell phone with you, you can also call you financial institution and tell them to invalidate 'em.
Would that work, I wonder? No clue. Just an idea. After all, the caged gerbil shooters and legal system are our biggest thieves.