Technically yes, you are treating it as a property rather than currency. Such a property is subject to positive and negative externalities (notably, inflation/deflation), and (where applicable) it is subject to taxation on transference (eg: inheritance tax, gift tax, etc).

From a purely economic perspective, cash is just another liquid asset. The distance from currency to store of value is quite short.

Physical assets are generally regarded as stores of value, however, in modern times, currency stability has resulted in currency supplanting durable goods as the primary store of value.