..... heard the saying not even worth the paper on which it is printed? Well I think any cryptocurrency is not even worth the atoms that composed the bits which make the bytes that make the characters that describe the mathematics referencing the cryptocurrency. Now on the other hand, a Porsche could be worth USD$150k and if I agree to pay that, like in any case, there where TWO parties involved in the transaction. So to the point, value is the amount of personal importance that one gives to something that I need/want. Don't want value to me is zero. I want, hum seller better not know or he will milk me.
In the not so distant future we will all be using cryptocurrenies: how much a loaf of bread, maybe BTC 0.00002; still if the hole of society says it is worth BTC 0.00001, then that will be the transaction cost from there onward.
BTC 0.00001 = 1 loaf of bread

@indepthstory