Expanding knowledge of bitcoin is uncomplicated with the help of Andreas Antonopoulos. It is because his contributions are available and can be easily access in different platforms. Thereby, anyone who wants to acquire basic understanding and gather necessary information can do it. Lastly, he explained every information in a thoroughly manner, but is straightforward that people that are unfamiliar with the concept of cryptocurrency would understand. Thus, I do believe he is very helpful, especially for beginners.