Have you lost money because your local currency depreciated against major currencies?
I believe you should try investing in forex accounts.

A Forex Trading Managed Account (or, hedging fund account) is the investment vehicle that beats devaluation far more than traditional portfolios. A Forex Managed Account is an investment portfolio, privately owned by an individual or institution, but managed professionally by experienced traders in the global currency market.

Here are a few advantages of a forex managed account:

• You also have access to check the activity of your account 24 hours around the clock showing you the net value via internet.
• You are not affected by the declining value (prices) of any of the currencies your trader will invest in.
• You earn above average returns on your investment.
• Your funds are kept in a world-wide accepted convertible currency at a first class bank.
• You are the only person having access to your account.

Due to all these reasons, I believe that investment portfolios are an excellent foreign exchange generating opportunity for developing countries.