There's an opportunity cost even if you are a winning player. That is often time with family. That's why I stopped playing. That was the friction to me.

The book is about balancing poker and life. In many ways, bitcoin is the opposite of gambling, but the price swings are a lot like bankroll swings of professional gamblers. One day you can buy a lot of stuff and the next day you can't. You can go on downstreaks for 100,000 hands. Youncan be a technical poker wizard, but go broke if you can't handle your emotions.

The book is more about those things.