No. That's money. Not all currencies are money. Zimbabwean dollars, for example, are a currency but they are not money. "Worthless currency" is not an oxymoron, but "worthless money" is. Money has value by definition. Currency doesn't.
> It is the reason why the term is derived from the word "current"
The etymology of a word has very little to do with its current meaning. "Calculate" is derived from the latin word for "stone", but that doesn't mean that calculating has anything to do with stones. (It did at one time, but not any more.)
> Currency is an algebra of the domain of money measured over the economy of that money's exchanges including the changes in inflation in relation to the money value of a dollar in relation to bread.
That might be a useful definition, but it's not the one used by economists. "Currency" is a proper subset of "money", which also comprises bank money [1], cash-equivalent securities [2] and commodities [3], all of which are money and none of which are currencies.
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[1] https://www.merriam-webster.com/dictionary/bank%20money
[2] https://www.investopedia.com/terms/c/cashequivalents.asp
A currency (from Middle English: curraunt, "in circulation", from Latin: currens, -entis), in the most specific sense is money in any form when in use or circulation as a medium of exchange, especially circulating banknotes and coins.[1][2] A more general definition is that a currency is a system of money (monetary units) in common use, especially for people in a nation.[3] Under this definition, U.S. dollars (US$), pounds sterling (£), Australian dollars (A$), European euros (€), Russian rubles (₽) and Indian rupees (₹) are examples of currencies. These various currencies are recognized as stores of value and are traded between nations in foreign exchange markets, which determine the relative values of the different currencies.[4] Currencies in this sense are defined by governments, and each type has limited boundaries of acceptance.