Back in August 2012, when negative interest rates were still merely viewed as sheer monetary lunacy instead of pervasive global monetary reality that has pushed over $6 trillion in global bonds into negative yield territory, the NY Fed mused hypothetically about negative rates and wrote "Be Careful What You Wish For" saying that "if rates go negative, the U.S. Treasury Department's Bureau of Engraving and Printing will likely be called upon to print a lot more currency as individuals and small businesses substitute cash for at least some of their bank balances."

Well, maybe not… especially if physical currency is gradually phased out in favor of some digital currency "equivalent" as so many "erudite economists" and corporate media have suggested recently, for the simple reason that in a world of negative rates, physical currency – just like physical gold – provides a convenient loophole to the financial repression of keeping one's savings in digital form in a bank where said savings are taxed at -0.1%, or -1% or -10% or more per year by a central bank and government both hoping to force consumers to spend instead of save.

For now, cash is still legal, and NIRP – while a reality for the banks – has yet to be fully passed on to depositors.