Economics is the science of making the best choices, and not just in the economic field, so it should be taught in all schools and from an early age.
The problem is that governments do not want conscious citizens, who could understand the folly of most governmental economic choices, and prefer to keep the population in ignorance.
Its a mature subject so that's why it start from to adult age by their choice because after that they can easily handle their job and digital currency but its not a tough subject rather it is a interesting subject to improve your country's economical situation and that's why students should read this subject in universities because it will very helpful for their future.