BookOut now on Amazon — in French
Investing for the Lazy
The method to grow your money in five minutes a month. Stocks, property, crypto and tax — no jargon.
Skip to contentGuillaume
Live
guillaumepessanha.com
Guillaume
Pessanha
Developer, Author & Systems Decoder.
Understanding and mastering our environment, from financial independence to human dynamics.
- Author of 4 books
4books written
Book · Out now on Amazon — in French
Investing for the Lazy
The method to grow your money in five minutes a month. Stocks, property, crypto and tax — no jargon.
Paperback 19,90 €
Kindle ebook 3,99 €9,99 €−60 %
Launch offer
01
Finance & Web3
Taking control of your money, from stocks to crypto, without jargon or stress.
02
Psychology & Relationships
Decoding what's at play within us and between us, for freer choices.
BookSecond half 2026 — soon!
Il elle pense quoi, là ?
One book, two sides: understanding men AND women — no tricks, no nonsense.
BookLate 2026
Stop Running from Yourself
Break free from self-sabotage without self-loathing: the 5 faces of the saboteur, and how to disarm yours.
03
Fiction
When decoding systems becomes a story.
Novel2nd half 2026
The Understudy
A psychological thriller about coercion and memory — an ending that makes you reread it all.
04
Web development
Sites and tools I design and build for the love of it — for people around me, the community, or just because the idea wouldn't wait.
Website
ISB Muaythai Tahiti
Official website for the ISB Muay Thai gym in Tahiti.
05
About
Developer, investor, and author: I wear several hats, but have one single obsession — understanding how the systems that govern us work, whether financial, psychological, or relational.
My work is to deconstruct these complex mechanisms and make them simple, actionable, and useful. The goal is never theory for theory's sake: it's about giving everyone back control of their life, their money, and their relationships.
06·What they say
Their thoughts.
It's rare to find someone who talks about finance, psychology and web development with such clarity. His content helped me take back control over several areas of my life.
The Academy
One course to invest knowing what you are doing
Short modules, one mechanism at a time, no jargon and no promise of returns. We explain how things work; what you do with it is yours.
The pillars read in order, but nothing forces it: each module explains one mechanism and stands on its own.
07·Right now
What I'm working on.
Writing
4 books in progress — finance, psychology, relationships and fiction. Second half 2026.
This site
guillaumepessanha.com is live and constantly evolving. You're on it — welcome.
08·FAQ
Frequently Asked Questions
Who is Guillaume Pessanha?
Guillaume Pessanha is a French-speaking author, web developer and investor. He has written several books on finance, psychology and fiction, and decodes complex systems to help everyone regain control of their life, money and relationships.
What books has Guillaume Pessanha written?
He is the author of books on finance ("Investing for the Lazy"), psychology and relationships ("Stop Running from Yourself", "Il elle pense quoi, là ?") and a novel ("The Understudy").
How can I connect with Guillaume Pessanha?
You can book a free 15-minute slot via the appointment button, subscribe to his newsletter, or contact him by email from the site guillaumepessanha.com.
09·FAQ
Answers to the questions people ask most
Everything beginners ask before getting started — in plain words, no jargon.
Is the Crypto Academy really free?
Yes, 100% free. All 30 modules, quizzes and simulators are available with no payment and no card. You can read each module's introduction freely; creating a free account (in seconds) unlocks the full module, the quizzes and saves your progress across devices.
Where should a complete beginner start?
Start with the fundamentals: what blockchain is, the difference between Bitcoin and Ethereum, then stablecoins. Move on to security (wallet and seed phrase) and the step-by-step buying module. You can also filter modules by level: beginner, intermediate, advanced.
How do I buy my first crypto?
The dedicated module walks through every step: pick a regulated platform, verify your identity, deposit euros via SEPA transfer, then buy Bitcoin or Ethereum in minutes. It's explained step by step, no traps.
Read nextBuy step by step
Do I have to pay tax on my crypto?
In France, crypto gains are generally subject to the 30% flat tax, declared via form 2086. The tax module explains the taxable event, the declaration and the tools that help. It's educational and not a substitute for personalised advice.
Read nextCrypto tax explained
How do I avoid scams and secure my crypto?
Two key reflexes: never share your seed phrase, and check every link and address before acting. The scams module covers the 6 most common traps (phishing, rug pull, fake airdrop…) and the security module explains wallets, private keys and best practices.
Read nextRecognise scamsSecure your wallet