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The question is: there are people willing to pay for it today, but will there be tomorrow too ? What if today people are willing to pay because of some kind of passing common folly that will disappear tomorrow ?

What?

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Think "church indulgences" - they used to be very expensive in the XVI-th century but became worthless a few decades later. Closer to use, think "fidget spinners"
fidget-spinner.jpg
They used to be something like $5 or more for one, now they are basically worthless. Turns out, they were just a childish fad with no intrinsic value (bar the very low entertainement value)

Ok thanks I think I see your point.

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