With age, they are taken out of circulation and replaced with new ones that dilute the number of old ones in circulation. As these become more and more scarcely seen they get more and more scrutiny.

A $1000 bill is still legal tendar. If someone passed one to you to cover a $1000 debt, would you look a bit closer to it and wonder why someone was passing a note that was clearly worth MUCH more (because of rarity) than the $1000 face value?

While the old $100's are still plentiful- your point is correct. But with each day that passes it becomes more difficult to pass the old ones. VERY LARGE quantities will go through machines for verifications. So it is mainly the small quantities passed here and there that beat the system (until a bank picks them up).

Counterfiets will always be out there. It just gets harder to make them. The BIG problem is that WE don't look at our money- we simply trust it (counterfieters rely on that fact!)

Your Thoughts? Agree/Disagree?