Cryptocurrency, or rather tokens of any cryptocurrency, in this case, Bitcoin ONE, would act as a bonus point when buying a product. For example, you came to the store, bought goods for 32 dollars, paid and received 10% of the purchase amount not in dollars, but in the form of 1 or 2 Bitcoin ONE tokens. Then these tokens could be used for exchange trading, selling to users or for future purchases at store's points or partner enterprises.