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assuming you invest in a currency of country which has a limited supply of money and you can be pretty sure that it will never be changed.
assume further that this country has the possibility to fill some niches in the global economy
you think it is insane to invest in the currency of this country?
If the currency is inflating @ 10% a year, and its dollar exchange rate has fallen by more than 50% in 2014? Let's just say "not very smart."