But that's just it. Economics is the study of personal preferences, either in small (micro) or large (macro) scales. Personal preferences are how people make value decisions, which they express through trades.
Also, I should point out that no one else in the entire world would ever come up with your definition of hoarding, and you've really only twisted "saving that society finds distasteful" to "saving that society finds statistically abnormal".
I think it was a trick.
I suppose it was a trick in that I didn't expect anyone to come up with a satisfactory answer. It wasn't a trick in the sense that I thought it was a self contradictory question or it was impossible to answer.
There is a lot of talk of hoarding, especially revolving around the concept of deflation. The idea is that if the purchasing power of a currency is rising, people will hoard it instead of spending it, as if the only correct way to use money is to spend it. Hoarding, or saving as I prefer to call it, is merely the action an individual takes when they prefer a liquid cash balance as oppose to less liquid investments. When people refer to saving as hoarding, to me what they are saying is that the person is saving an excessive amount. Again, excessive is completely subjective.
I feel like the definition that you presented was carefully crafted to exclude things that you do not consider "excessive", but does not fit the normal use of the word. That is why I do not feel obligated to pay you the bounty.
I think we're not that far off. I think we both see hoarding as similar to saving, but different in degree. I don't think there's anything wrong with hoarding, and I don't think the definition I proposed implies that there is anything wrong with hoarding. As several posters have noted, hoarding can serve as a value to society, as the profit motive rewards people who recognize trends or future developments and accumulate/preserve the appropriate resources for later distribution.
The definition I proposed simply offers an objective way to tell whether someone is accumulating a significant amount of something for a particular purpose (expected significant increase in prices). What are normal uses of the word that my definition does not fit? Accumulating liquor and guns for an apocalypse would seem to fit, hoarding bitcoins with the anticipation of significant profits would seem to fit, putting 10% of my weekly paycheck in a CD would seem not to fit (and would be considered saving, which I think comports with the generally accepted use of the word)? What does my definition exclude that should be included? Again, I'm not looking for the bounty, just interested in pursuing the discussion at this point.