Forex is investment in a country

Forex trading is the indicator on financial system worldwide. USD/EURO/GBP/Gold/Silver are the pillars of trading and business worldwide. When you buy, for example US dollar, you show your confidence in US economy. Gold and Silver is universally accepted investment which protects people's wealth during wars, inflation etc.. So investing in forex is investing in a country and not in a company. In stock markets, you invest in a company and 150 of Fortune 500 companies have closed down since year 2006.

China has warned "war can break out anytime" in Korean Peninsula.

Yes I agree with the point you have explained here. When we purchase one currency to trade it shows how much confidence I am about the currency and we are basically making in that nation. And the more confidence traders have on a particular currency the better balance of payment that nation will have. Again while investing commodity like oils, gold, silver, etc. also can bring prosperity for that nations which possess them.