If you can't nuke it, melt it..... (Score 1)

If the coils resist microwaves, there will still be some way of destroying them. Sustained heat, just below paper's flash point, electromagnetic pulses, or if push comes to shove, a pin hammered through the center. They simply won't be able to make these indestructible and cost reasonable.

Big government will have to push the use of scanners (for "counterfit detection", of course) at as many commercial outlets as possible, or rely on the apathy of the masses....