Playing the numbers

[Tarrel]

Scythe, when you draw the distinction between planning "on" something happening and planning "for" something happening, do you mean, for example;

Say there's a banking crash. Preparing for it might mean holding some cash to use if the ATMs fail (good idea), but planning on it might mean maxing out your credit cards in the belief you won't have to pay the money back if the banks crash (bad idea)?

What's the old expression; "Hope for the best, prepare for the worst".