I agree with others on the "Meditations" by Marcus Aurelius.

Off the top of my head, I would add:

* "The Way to Wealth," by Benjamin Franklin: https://www.amazon.com/dp/0918222885 (also available online for free; it's in the public domain) -- no-nonsense practical advice from a super-successful individual

* Warren Buffett's Letters to Berkshire Hathaway shareholders: http://www.berkshirehathaway.com/letters/letters.html (also available organized by topic, in a bound book: https://www.amazon.com/dp/1611637589 which some will find much easier to read)

* "The Intelligent Investor," by Benjamin Graham (specifically the chapters titled "The Investor and Market Fluctuations" and "Margin of Safety"): https://www.amazon.com/dp/0060555661

* "Influence: the Psychology of Persuasion," by Robert Cialdini: http://www.amazon.com/exec/obidos/ASIN/0688128165

Also:

* "Devil Take the Hindmost," by Edward Chancellor: https://www.amazon.com/dp/0452281806

* "A Short History of Financial Euphoria," by John Kenneth Galbraith: https://www.amazon.com/dp/0140238565

* "Extraordinary Popular Delusions and the Madness of Crowds," by Charles Mackay: http://www.amazon.com/exec/obidos/ASIN/1586635581

The Devil Take the Hindmost

http://www.amazon.com/Devil-Take-Hindmost-Financial-Speculat...

Why do you think I'm paranoid? It's my best guess. Despite my tender years I have seen many speculative bubbles in lots of asset classes and have traded them on a private and professional basis.

I agree there are plenty of people in bitcoin ready to be 'the greater fool' [1] but that's only if it fails... they will be self assured visionaries otherwise...

[1] http://www.amazon.co.uk/Devil-Take-Hindmost-Financial-Specul...