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

Hamilton Growth

Growth without grind.

At HamiltonGrowth, I help Founders scale by installing high-leverage systems — not giving them more to do. My flagship program, The Founder’s Growth Engine, is a 1:1 partnership where we co-build growth systems tailored to your business, so you can generate qualified leads, attract better customers, and increase revenue in less time— without sacrificing the work you love.

Each engagement includes offer architecture, brand messaging, delegation systems, and DFY infrastructure — designed to reclaim your time, sharpen your focus, and scale your business with clarity.

No theory. No fluff. Just calm, confident growth.

Founder & Growth Partner | Helping Founders Scale Without Sacrificing What They Love

Sensitive Strength

Training & Coaching for the Highly Sensitive Person.

Vinobox

Head of Growth

bunq

Responsible for:
- Building the international advertising infrastructure for Google Ads, Facebook/Instagram and Snapchat
- Optimising advertising spend for these channels for NL/DE/FR
- Utilising Segment and mobile measurement partner Adjust to measure and attribute paid advertising efforts
- Reporting on results through Google Analytics & MixPanel
- Creating and streamlining workflows on ad creation, ad launch, optimisation and A/B testing of the material

Growth Marketer

We Are Builders

We Are Builders (WAB) is a startup studio within the B2B SaaS segment that builds startups together with their founders in addition to a self- managed funds of investors. The function of the studio is to bring startups to scaleups within 18 months, and to facilitate that progress through expertise, tech and $$$.

As part of the core management team it was my task to create a strategy template for future ventures and to setup the basics for digital marketing efforts like AdWords, SEO, Google Analytics, Google Tag Manager, MixPanel, A/B testing, email marketing, display/ video advertising and content plus social strategy. During these 2 months I delivered a template that can be for the existing and new ventures.

oneUp

oneUp delivers startup thinking for corporates, and in this case oneUp was building a loyalty program called MYTOMMY; an app that's part of the Tommy Hilfiger ecosystem. As growth marketer it was my duty to further strengthen the efforts of making the app successful.

I've supported the project with:
* Interviewing stakeholders and creating a measurement framework in which success was defined;
* Getting performance information to the right people at the right time;
* Being the MixPanel GoTo guy if app user data was needed;
* Analysing experiments, documenting learnings, and creating hypothesis for new experiments;
* Running experiments;
* Building the bridge between the MYTOMMY data and the CRM data of PVH.

Growth Marketer @ Tommy Hilfiger

Bammboo - Growth Marketing Agency Amsterdam

Bammboo.io is a Growth marketing agency in the BeNeLux that focuses on growth through data driven marketing. The services they offer are education, coaching and training, consultancy and hands-on online marketing sprints.

I've been active in the following fields as a growth marketer:
SEO, SEA, Google Analytics, Google Tag Manager, CRO, A/B testing, webanalytics, marketing intelligence, Tableau and data driven storytelling.

Customers and the projects I was responsible for:
* Young Capital: building a 6-week marketing intelligence bootcamp and a 2-day AdWords course from scratch for the digital traineeship
* InfoSupport: growth marketing efforts to gain more traction for the AI domain
* HealthyWorkers: mapping and visualizing customer journeys

TransIP

It was my duty to ensure that our efforts at growth were greater than the sum of their parts by aligning channels paid- and organic search, display, email, social and affiliates.

By understanding customer journeys and customer lifetime value of our many different client types, I made sure we allocated resources towards achieving the most growth. I created, measured, and evaluated growth strategies and proposed iterations.

Finally, it was my job to make sure that team members of the Online Marketing Force developed skill, curiosity, and a knack for data in pursuing their part of the Online Marketing Force’s growth goals.

What I actually did:
* Be the GoTo specialist within the area's of SEO, SEA, social, affiliate, display and webanalytics
* Build a business intelligence unit of 3 FTE and introducing BI tool Tableau
* Build an online marketing unit of 7 FTE (SEO, SEA, social, affiliate, display, webanalytics and myself as growth marketer)
* Total rework of Google Analytics implementation through Google Tag Manager
* Complete integration of DoubleClick for advertising together with Expand Online
* Introduced Growth Marketing with multidisciplinary teams using sprints

Head of Digital Marketing & Analytics

LinkExpert

- Google Analytics;
- Google Adwords;
- On- and off-site SEO.

SEO / SEA Specialist

ReachLocal

Responsible as Internet Marketing Consultant at ReachLocal Netherlands.

SEA Marketeer

Over the last 15 years, I’ve helped scale various brands — from early traction to 7-figure systems — through high-leverage marketing, growth strategy, and team-built execution.

Today, I help founders install The Founder’s Growth Engine — a 1:1 partnership where we co-build revenue systems that generate qualified leads, attract better clients, and create scalable growth without burning out or getting stuck in the grind.

My mission is to help 1,000 founders stop carrying their business alone — and build systems that let them grow from clarity, not chaos.

What I do:
→ Help founders build scalable growth through repeatable systems
→ Build lead, client, and revenue engines
→ Run The Founder’s Growth Engine — a private 1:1 program with DFY systems, workshops, and async support

Results:
→ Revenue doubled within 6 months (Eagleton)
→ Burnout to stable growth in 3 months (HYP)
→ $5k to $25k/mo revenue system within 3 months (FlaschenGeist)

If you're ready to install what works — and stop guessing — DM me.

taplio

The Battle

Marcello Duarte Vieira

Jeremy Hamilton

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