Water water everywhere, nor any drop to drink
Iran’s gasoline crisis stems from a combination of a lack of supply (refinery capacity is insufficient) and strong demand (a direct result of some extremely generous fuel subsidies – gasoline is sold at around one fifth of its real cost). Rationing fuel is only likely to increase inflationary pressure in Iran, and any additional UN sanctions will serve to make matters worse.
The value of investments will fluctuate, which will cause prices to fall as well as rise and you may not get back the original amount you invested. Past performance is not a guide to future performance.