I am the currency of a country with a unique tri-color flag featuring a yellow sun and a blue band. My value is known to fluctuate significantly due to the country's economic volatility and political instability. A major export of this country is a crop famously associated with a popular breakfast beverage. I am not a commonly held reserve currency, and my central bank is known for its interventionist policies.

1. The country's flag has a yellow sun.
2. The country is known for its coffee production.
3. The currency is not widely used in international reserves.
4. The country's economy is known for its volatility.