Foreign Exchange Traders

How does Foreign Exchange trading enrich the world apart from by making profits for traders?

I can see how shares and bonds help to raise investment money the market in foreign exchange seems to leave whole economies open to plunder so surely there must be a benefit?

Free foreign exchange means that the value of assets will mark to market no matter what currency you use. You would not want to invest in a country where it was difficult to freely excusing the currency — e.g. the Ruble back in Soviet days.

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