A cryptocurrency [cachecredit] is some transactionable reward function* as the resultant (encrypted current) of a hash exercise.** Often valued in a swap💱. (compare cryptocommodity, see ludeiy, link)
/// +To me, cryptocurrency is more or less some cipher that you either have to build or break in order to claim the residual. In other words, 'you have to work to retrieve it'.
+The amount of rewarded crypto should at least cover the cost of the energy used to create the crypto itself.