[Currencies fluctuate that is a fact!] It is not a fact. Only currencies on a floating exchange arrangement move on a continuous basis in line with foreign exchange activity, known as appreciation/depreciation. Currencies on a fixed exchange arrangement are exactly that, “fixed” by the country concerned, they do not fluctuate. If a significant difference develops between the foreign exchange market and the fixed rate, the central bank may intervene to remove the differential. This used to be common in Vietnam, they had many devaluations over a short period of time. Fixed exchange currencies are revalued/devalued. Only about a third of the world’s currencies are on a floating exchange arrangement.