To my understanding nothing and I mean absolutely nothing is hard to understand . Man have the ability to learn and relearn. Understanding Cryptocurrency or rather bitcoin is a function of choice and the individual interest.like the popular saying goes “what is worth doing is what doing well” Cryptocurrency is worth understanding and we can go to any level to get its understanding without depending on any book/manuals. These the information and technology age, information are transmitted using different reliable and easily accessible platform. And I believe one with the urges to understand Cryptocurrency is not limited to using book or manuals.Thank you