Hi Denis! If you want to learn about bitcoin, I highly suggest you visit ‘BitcoinRich.com’ and take the paid course. A guy named Christopher Greene, who is himself a bitcoin millionaire, teaches you how bitcoin works, all from the basics to the much more complex. You will learn a lot basically, like how to create bitcoin portfolios, verifying ID with Coinbase and much more. He has been working with bitcoin for around 10 years, and so he knows what he is talking about. People who already took his course said that they are benefitting hugely from learning about bitcoin.