3a312c46_tal_Commodities___Bitcoin_Wiki__Ideal_Implementation
[Property] Unique Use-Value? D [Notes] BTC is the only currency that can be used to pay for storing data in the block chain, which is useful for secure timestamping. Competing block chains would probably not have the required incentives for generating that Bitcoin does. [Ideal Implementation] 
ideally a commodity should have a unique non-monetary use-value
Ideal Properties of Digital Commodities - Bitcoin Wiki
Ideal Implementation