What you said is true but I still blame this underdeveloped countries for such economic downtime, mainly this happens in African countries where the presidents and his appointees see public offices as a personal business that anything can be done without further questioning from the citizens, I strongly believe that many underdeveloped countries government knows what to do so that anytime dollar appreciates in the financial market they won't be affected, many countries lack production mindset and good policies, when there is production of both edible and other goods you will see that such currency will never be affected by the rise of dollar, stringent policies should be on ground in different parastatals, locally made made good should be encourage every purchase in the country should be done with the local currency, both payment in the hotels or worker in all level, import duties, with this policy such countries can stand without the wave of any currency.