"In the journey of creating financial freedom and building wealth, most people sabotage themselves with emotional traps, hype-driven schemes, and rookie mistakes that wipe out their hard-earned gains. David Leiter's Stop Making Stupid Investments is the wake-up call most investors need—a no-BS blueprint to sidestep the pitfalls, master an investing mindset, and unleash the power of smart, disciplined investing."

- Tony Robbins, #1 New York Times Bestselling Author of The Holy Grail of Investing

"David Leiter says out loud what too many investors learn the hard way. Real wealth is not built by chasing hype, it is built by avoiding stupid mistakes. This is a clear and practical playbook for protecting your capital and compounding intelligently, exactly how serious investors should think."

- Peter Mallouk, CEO Creative Planning

"David Leiter always provides perspective to avoid the dumb mistake tax, and when you combine that with good in-depth investing insights, it is a winning combination. I highly recommend this book. Good books are rare. Great people are even more unique."

- Joel Seiden, Co-Founder, Stonehenge Partners, Billons in transactions in NYC real estate, and Co-Founder, Spirit of Entrepreneurs Council

"As a professional investor who is acutely aware of my own weakness and biases, just buying this book for Chapter 3 on 'know thyself' will save you money and heartbreak. If truly taken to heart in all aspects of your life, you will increase your chances of a happy marriage and having kids that can thrive. The book provides a fundamental road map for those seeking better lives for themselves and their family through investing like adults and not like children."

- Jonathan Barrett, President CIO of Luminus Management, a hedge fund with $3 Billion in peak AUM - over 1000 points of annual alpha generation over 18 years

"I have joined two of David's programs over the past few years, and I have consistently seen his calm discipline and values driven approach to investing. This book reflects how he teaches in real life, helping readers understand business fundamentals, invest with integrity, and stay grounded when others chase hype."

- Ellen Yixiang Liu, MD, PhD, MBA. Founder of 911 Pain Management

"David's teachings completely changed the way I think about investing. Thanks to his guidance, my portfolio grew by over 47% last year, and I now invest with far more confidence, clarity and discipline."

- Emma Grace Hernandez, PhD in Law, President of Universidad de Iberoamerica UNIBE and UNIBE University Hospital