I agree with you that currencies of 3rd world countries are not that stable. However, their interest rates in bank deposits are high. There was a time when a savings account in the Philippines would earn you 7% per annum while the time deposit was as high as 20% per annum. That's like earning 1/5 of your principal deposit. And your money is safe because it is covered by insurance as required by law. But the risk is also high when the economy suddenly slides down and the currency is devalued. Goodbye interest.