Countries of third world are being controlled by powerful economies. They are always at the risk of Financial recession. Many Countries have valuable natural reserves or potential to do progress.
country which has oil, gold minerals and tourist places but do not have enough funds to invest on these project. So to bring some investments a coin may be introduced for development in these fields and sharing profits with all coin holders. just like current system of issuing bonds by governments.
It is very difficult to implement because of the possible big machinations in this system. Due to the fact that the world community has not yet accepted this, individual states are in no hurry with the decision. This is a rather difficult decision, it is worth more prepared for this issue.