For me I think scarcity play a good role in the value of any one, think about it, scarcity means people are reluctant to sell, they are hold their cons, and that will make the buyers to bid higher to attract the sellers to sell.
You haven't read the above before answering. Scarcity doesn't change much if the scarce object has no meaning and no use. An example of such scarce and useless object can be art by some unknown street artist. They make one of a kind portraits every day and to some people they are valuable (especially to the ones on the portraits or their loved ones), but they don't hold market value, even though there are no identical drawings anywhere in the world.
I could send you my one and only autograph for only 0.1 BTC. It's scarce. Would you buy it?