My point is that your "prognostication" is no more accurate than his was at the time.
Eventually, there will come some sort of massive economic crash / adjustment of seismic proportions. It happens in all human societies so far on this planet. And when it does, the last group to say "it's coming soon!" will be right - by pure chance. Until then, they'll be wrong. Like Roger. If it doesn't happen in the next 20 years, are you likely to come back her and say "oh yeah, my bad, I read the tea leaves wrong!"?