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 Yup. 

But many commodities can serve as money, albeit inefficiently. Rum in Colonial Australia. Tide laundry detergent among 1980s Food Stamps recipients in California. 
 Yes. But that's not as efficient as a fat stack of $100 bills. 

I just am concerned that I'm missing something simple and effective.  
 If you think of it, let us know! That's usually considered cryptocurrencies' UVP, especially after crackdowns on cash and precious metals.