[glorgau]

Or it could just be that the reason is the stated one - to deter counterfeiters. Also, there is a bunch of narco cash that has to be flushed out of the hiding places in this world.

[tonyinv]

Not to mention terrorist money. Wasn't there hundreds of millions of dollars found in Iraq? I say force everyone to exchange the old greenbacks for the new bills.

This would force the money into the banking system wouldn't it? I dont know, just guessing.

Hasn't a collapse of the menetary system been predicted since day one?

[Hank Rearden]

Or it could just be that the reason is the stated one - to deter counterfeiters.

As long as the old design (the one from years ago, not the most recent update) is still valid currency, why not just continue to counterfeit that? It's been done many times.