Yes it is always real value at least at the moment of exchange You agree you state agreed value No when the shared consensus on a value disappears the value does not always disappear under all circumstances It may only disappear for the two parties who previously agreed A gold coin may have had no value for the victims of the Titanic at the time the Titanic went down That gold coin always had value till today and will have value in the future Adam Smith regarded a bushel of wheat as a stable measure of real value Every daily inflationindexed or daily deflationindexed national currency that means it is possible in all currencies  bitcoin is not included here is a perfectly stable in unit of real value and will always be that for a indefinite period of time during all levels of inflation and deflation Wow now I have revealed the perfectly stable unit of real value to you Well it was possible since  when the ILO institutionalized the CPI You cannot group bitcoin with the dollar and euro the last two are money Bitcoin is not money Bitcoin is a medium of exchange like the dollar and euro but it is not money it is not a monetary unit of measure no financial reports are prepared in bitcoin During hyperinflation the real value of ONLY the MONETARY economy changes EXACTLY with the real value of the hyperinflationary local currency obviously excluding daily inflationindexed monetary items government bonds