Andreas M. Antonopoulos is a best-selling author, speaker, educator, and highly sought
after expert in Bitcoin and open blockchain technologies. He is known for making complex subjects easy to understand and highlighting both the positive and negative impacts these technologies can have on our global societies. Andreas is known as a neutral, unbiased and reliable source of information about Bitcoin and open blockchain.(from https://aantonop.com/)
In 2012 Antonopoulos became enamored with bitcoin. He eventually abandoned his job as a freelance consultant and started speaking at conferences about bitcoin, consulting for startups, and writing articles free of charge.
According to his podcast, Antonopoulos is a consultant on several bitcoin-related startups.
In April 2014, Antonopoulos organised a fundraising campaign for Dorian Nakamoto, who was identified in a Newsweek article as the creator of bitcoin, Satoshi Nakamoto. The reporting techniques used in the article were controversial among journalists and Bitcoin community members. The fundraiser, intended to assist Nakamoto after the attention he received as a result of the article, raised 50 bitcoins, worth US$23,000 at the time.
On 8 October 2014, Antonopoulos spoke in front of the Banking, Trade and Commerce committee of the Senate of Canada to address the senators' questions on how to regulate bitcoin in Canada.
In March 2016, the first edition of Mastering Bitcoin was released by Antonopoulos, in print and online, followed by a second edition in June 2017.
Bitcoin for Beginners