M2 has grown at an average of 8.365% over the past 10 years, 7.063% over the past 20, 6.436% over the past 40, and 7.145% over the past 60. M2 is a much better

M2 has grown at an average of 8.365% over the past 10 years, 7.063% over the past 20, 6.436% over the past 40, and 7.145% over the past 60. M2 is a much better gauge of inflation than the CPI (unless you're poor). At 7% inflation, holding USD means your value will decrease by nearly half every 10 years.