I've just watched "Bitcoin’s Seven Layers of Security #1 | The Saylor Series | Episode 14 (WiM056)" from Robert Breedlove with Micheal Saylor. I can really recommend this episode! Saylor explains the seven layers of Bitcoin's security. It was truly eye-opening to see how deep this goes. I knew that Bitcoin mining was brilliant and how it works. But this gives a whole new perspective. Energy, technology and politics will secure Bitcoin due to mining. 100% worth your time.