psionl0
Skeptical about skeptics
Exactly! That's all there is and there ain't no more.You seem to think that "demand" is the only source of "value"; that a thing has a "price" only because there are people willing to pay that price, but no more fundamental principle is involved.
Sure, in some cases, you might find a rational theory to explain the price of something. For example, stock prices are generally some multiple of the dividend the stock pays and that multiple depends upon the public perception of the reliability of the dividend and what the returns of comparable investments might be.
If demand for something radically changes suddenly then a reason for the change in demand can often be isolated. However, you can seldom predict when demand for something will suddenly change nor the direction of the change.