I began investing in 2005 while still in medical school. In 2007, I started trading on the Brazilian stock exchange. 

By 2008, I was investing in the forex market using automated robots. For many years, I saw good returns with my stock portfolio in Brazil. 

Through day and swing trading with robots in forex, I had excellent years and others not so much; my results were unstable, though I tended to win more than lose. 

In 2020, I started investing in cryptocurrencies with robots, and in 6 months, I turned $32,000 into over $1 million. I stopped trading and exited this market upon identifying the end of that bull market cycle. 

Also in 2020, I began to study macroeconomics in depth, which became part of my analysis process, using fundamentals in my analysis as well and keeping up with new technologies. This is how I identified opportunities in cryptocurrencies, recognizing a time when the macroeconomic scenario was favorable, blockchain was an emerging technology, and then I developed a portfolio strategy that had an edge in selecting cryptocurrencies. 

Nowadays, my strategy is focused on long/short in the US stock market, aiming to buy (long) the best stocks (usually large tech stocks with high growth potential, solid business moat, but also some excellent defensive stocks) or ETFs of the best sectors and sell (short) ETFs that have poor strategies and/or prospects.

Investor

Marcello Vieira - Investidor de Sucesso

I founded 'Successful Investor' while working full time as a doctor back in 2012, teaching people how to invest more effectively.

The strategies have evolved over time, but I only teach what I do with my own money.

We now have over 15,000 students learning about investments in crypto and stocks with the goal of achieving financial freedom.

Founder

Medical Doctor

The All-Weather Investor | Building a $5M portfolio—$1M already achieved | Sharing everything I learn along the way

Strategic stock investing for Wealth Managers and Family Offices.

Wealth preservation is essential. 

But true financial stewardship requires strategic growth—built on conviction, discipline, and risk management.

Many wealth managers and family offices struggle to find stock investment strategies that deliver superior returns without unnecessary complexity. Our approach bridges that gap.

I’m Marcello, a former doctor turned full-time investor with two decades of experience in stock and crypto markets. 

Since 2016, I have worked with wealth managers, family offices, and high-net-worth individuals to implement investment strategies that maximize performance while protecting capital.

In 2020 and 2021, my momentum-based approach transformed $32,000 into over $1 million. 

Today, we refine and apply that strategy for professionals seeking an edge in the markets.

What we offer: 

↳ Institutional-grade stock strategies designed for long-term performance
↳ Risk-managed investment frameworks to navigate uncertainty with confidence
↳ Tailored solutions for wealth managers and family offices seeking scalable, high-conviction strategies

If you're looking to strengthen your portfolio strategy with a proven, data-driven approach, email me at marcello@mdvinternational.com

Marcello Duarte Vieira

Construction Consultant & Coach | 25+ years experience | Helping businesses structure, scale and sustain with digital systems & real world strategies | More control. More freedom. Higher profits

Structure. Systemise. Scale. Sustain.

Business Consultant | High-Performance Coach 

Creator of Satoris Scaling System | Thrive OS

I help companies systemise operations, scale efficiently, and take back control - with frameworks built from 25+ years of real-world experience.

As a business consultant and high-performance coach, I partner with founders who are stuck in the day-to-day grind. Whether it’s firefighting projects, drowning in admin, or lacking systems to grow—I bring structure, strategy, and sanity back to the business.
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My Core Consulting Framework:

The SATORIS Scaling System

Built for companies ready to scale without chaos.
✅ Streamline operations and eliminate inefficiencies
✅ Implement systems that save time and boost profit
✅ Build a business that runs without constant oversight
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My Signature Coaching Framework:

The THRIVE OS

Designed for high-performing founders and leaders who want to lead with clarity, energy, and resilience.
✔ Master mental toughness and bounce back stronger
✔ Build sustainable routines to maximise focus and energy
✔ Lead with emotional intelligence under pressure
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What I Offer:
•	Done-for-you and fully customised digital business systems 
•	1:1 Consulting & Coaching for owners ready to scale and lead
•	Workshops on leadership, resilience, and performance
•	Digital Programs powered by THRIVE OS & SATORIS Scaling System
________________________________________

Who I Work With:
SME business owners, leaders and high performers who want to:
•	Systemise their operations
•	Step into true leadership
•	Build teams and workflows that don’t depend on them
________________________________________

Why Work With Me?
I’ve scaled businesses, rebuilt after setbacks, and coached leaders through chaos. I’m not here to give advice—I build systems, guide execution, and drive results.
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Let’s Connect:
•	DM for coaching, consulting, or speaking enquiries
•	Email: westley@satoris.co.uk 
•	Based in Dubai | Working globally

taplio

The Battle

Marcello Duarte Vieira

Westley Harnett

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