[XorNot]

By observing that the USD did not "collapse" despite it?

Plenty of BitCoin people seem adamant the USD is definitely going to collapse, but can't explain why it hasn't already, or where the instability causing it too would come from, or why smaller, less wide-spread currencies don't do the same barring exceptional circumstances (i.e. Zimbabwe).

[maxerickson]

I more meant the 2-4% range part. If you had said 30 years, fine. But inflation was (well) over 4% for much of the 10 years prior to 1983.