thousands of years of History tells us that the average life span of a fiat currency is 45 to 50 years. Do the math..
Do you have any examples of fiat currency systems that fell apart in roughly that amount of time? And any examples of hard money system societies that weren't eventually felled by the disintigration of their society, regardless of money?
Not disagreeing with you, but I'm not familiar enough with the lessons of money history to know what you are referring to.