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

Pathos Labs

The United Synagogue

Rabbi

Immanuel College, Bushey

Head of Sixth Form Jewish Education and Informal Jewish Education

Youth Director

Hasmonean High School

Informal Educator

Spent 15+ navigating high-stakes communications in the military and communities around the world. Now working with founders and executive teams at fast-growth companies to distill complex ideas into clear, investor-ready narratives.

Here's what clients say:

"Transformational. Sam’s coaching significantly boosted our team's confidence, clarity, and delivery."– Sam Fromson, Co-founder & COO, YuLife ($800M valuation)

"Sam distills intricate ideas into compelling messages. His guidance transformed our complex scientific pitch into something truly impactful."– Benjamin Swerner, Co-founder & COO, Relation Therapeutics ($140M+ valuation)

"Sam embodies the philosophy 'do first, coach later'—a rare find among 145,000+ business coaches worldwide. Don't hesitate to work with him."– Jonny Staker, Founder, Vanquish Consulting

"Sam asks questions that stop you in your tracks—in the best way. He challenges you to rethink your approach. It's truly transformative."– Naima Rashid, Founder, bluum

"If you want real insights and meaningful progress, personally and professionally, reach out to Sam. You'll leave better than you came."– Jason Delatolla, Co-founder, Graewolves

Ready to sharpen your message and amplify your impact? Let’s talk.

Sam Millunchick

This is how you stay powerful when someone’s trying to corner you.

The interviewer tries to lull Syndey Sweeny into a trap, and she gives a masterclass on high-stakes communication and how to hold frame.

𝗙𝗶𝗿𝘀𝘁, 𝘁𝗵𝗲 𝗶𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝗲𝗿’𝘀 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝘆:

She does 𝘁𝗵𝗿𝗲𝗲 things in a row:
1. 𝗗𝗶𝘀𝗮𝗿𝗺 → 𝗣𝗿𝗮𝗶𝘀𝗲 → 𝗕𝘂𝗶𝗹𝗱 𝗥𝗮𝗽𝗽𝗼𝗿𝘁 “I really like your jeans. You look great.” This lowers her guard. Classic 𝘸𝘢𝘳𝘮 𝘢𝘱𝘱𝘳𝘰𝘢𝘤𝘩 before shifting into control.
2. 𝗣𝗼𝘀𝗶𝘁𝗶𝗼𝗻 𝗛𝗲𝗿𝘀𝗲𝗹𝗳 𝗮𝘀 𝗘𝗺𝗽𝗮𝘁𝗵𝗲𝘁𝗶𝗰 𝗚𝘂𝗶𝗱𝗲 “I would probably feel thankful… very powerful people had my back.” This subtly 𝗼𝗳𝗳𝗲𝗿𝘀 𝗵𝗲𝗿 𝗮𝗻 𝗲𝗺𝗼𝘁𝗶𝗼𝗻𝗮𝗹 𝗶𝗻𝘁𝗲𝗿𝗽𝗿𝗲𝘁𝗮𝘁𝗶𝗼𝗻 she is invited to adopt.
3. 𝗙𝗿𝗮𝗺𝗲 𝘁𝗵𝗲 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻 𝗮𝘀 𝗮 𝗙𝗮𝘃𝗼𝗿 “I just wanted to give you an opportunity to talk about that specifically.” This is the trap. The phrase “𝘨𝘪𝘷𝘦 𝘺𝘰𝘶 𝘢𝘯 𝘰𝘱𝘱𝘰𝘳𝘵𝘶𝘯𝘪𝘵𝘺” presupposes:

• She 𝘯𝘦𝘦𝘥𝘴 an opportunity
• She has something to explain
• The inteviewer is the benevolent gatekeeper

If she accepts that frame, she is:
• Defensive
• Justifying
• On trial

The interviewer never said “You’re guilty.” But the 𝗰𝗼𝗻𝘃𝗲𝗿𝘀𝗮𝘁𝗶𝗼𝗻 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 says she is.

This is what people mean when they call this 𝘴𝘰𝘤𝘪𝘢𝘭 𝘤𝘩𝘦𝘴𝘴.

𝗡𝗼𝘄 𝗦𝘆𝗱𝗻𝗲𝘆’𝘀 𝗺𝗼𝘃𝗲:

“I think that when I have an issue that I want to speak about, people hear.”

This does 𝘁𝗵𝗿𝗲𝗲 𝘁𝗵𝗶𝗻𝗴𝘀 in one sentence:

1. 𝗥𝗲𝗷𝗲𝗰𝘁𝘀 𝘁𝗵𝗲 𝗙𝗿𝗮𝗺𝗲 She does not explain, defend, or justify anything. She does 𝗻𝗼𝘁 step into the “accused” role.
2. 𝗥𝗲𝘀𝘁𝗼𝗿𝗲𝘀 𝗔𝗴𝗲𝗻𝗰𝘆 She re-centers the conversation on 𝗵𝗲𝗿 𝗮𝘂𝘁𝗵𝗼𝗿𝗶𝘁𝘆 𝘁𝗼 𝗰𝗵𝗼𝗼𝘀𝗲 𝘄𝗵𝗲𝗻 𝗮𝗻𝗱 𝘄𝗵𝗲𝘁𝗵𝗲𝗿 𝘁𝗼 𝘀𝗽𝗲𝗮𝗸.
3. 𝗥𝗲𝗮𝘀𝘀𝗲𝗿𝘁𝘀 𝗜𝗱𝗲𝗻𝘁𝗶𝘁𝘆 She doesn’t define herself by controversy. She defines herself by 𝘪𝘯𝘵𝘦𝘯𝘵 𝘢𝘯𝘥 𝘤𝘰𝘯𝘵𝘳𝘰𝘭 𝘰𝘧 𝘯𝘢𝘳𝘳𝘢𝘵𝘪𝘷𝘦.
   
She doesn’t argue about whether the ad was offensive. 
She doesn’t validate the criticism by responding to it. 
She doesn’t counterattack. 
She doesn't moralise.

She 𝗿𝗲𝗳𝘂𝘀𝗲𝘀 𝘁𝗵𝗲 𝗽𝗿𝗲𝗺𝗶𝘀𝗲 and returns to 𝘀𝗼𝘃𝗲𝗿𝗲𝗶𝗴𝗻𝘁𝘆.

This is 𝘱𝘶𝘳𝘦 𝘧𝘳𝘢𝘮𝘦 𝘤𝘰𝘯𝘵𝘳𝘰𝘭.

𝗧𝗵𝗲 𝗠𝗼𝗿𝗲 𝗦𝘂𝗯𝘁𝗹𝗲 𝗧𝗵𝗶𝗻𝗴 𝗦𝗵𝗲 𝗗𝗼𝗲𝘀: 

She 𝗮𝗻𝘀𝘄𝗲𝗿𝘀 𝘄𝗶𝘁𝗵 𝗻𝗼 𝗲𝗺𝗼𝘁𝗶𝗼𝗻𝗮𝗹 𝗰𝗵𝗮𝗿𝗴𝗲.

No:
• edge
• pressure
• indignation
• defensiveness
• eagerness to be understood

Instead, she stays with:
• no spike in vocal tension
• uncompressed breath
• measured rhythm
• warm tone
  
Her 𝗻𝗲𝗿𝘃𝗼𝘂𝘀 𝘀𝘆𝘀𝘁𝗲𝗺 𝗿𝗲𝗺𝗮𝗶𝗻𝘀 𝗶𝗻 𝘃𝗲𝗻𝘁𝗿𝗮𝗹-𝘃𝗮𝗴𝗮𝗹 𝘀𝗼𝗰𝗶𝗮𝗹 𝗲𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁 𝗺𝗼𝗱𝗲.

This is the real flex.

If you stay regulated:
• You keep your timing.
• You keep your face still.
• You keep your syntax fluid.
• You keep your options.

Regulation 𝘪𝘴 𝘵𝘩𝘦 𝘧𝘰𝘶𝘯𝘥𝘢𝘵𝘪𝘰𝘯 of frame.

High-stakes communications • Stay calm, clear, and in control when it matters most

What I believe with all my heart:


• Communication is nervous system management
• Presence is the capacity to stay unchanged by other people’s expectations
• Clarity is about 𝗿𝗲𝗱𝘂𝗰𝗶𝗻𝗴 effort on the listener
• Authority (frame) is self-remembering under pressure
• You don’t need to project confidence. You need to be un-movable.

taplio

The Battle

Marcello Duarte Vieira

Sam Millunchick

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The Battle

Marcello Duarte Vieira

Sam Millunchick

Followers

Posts

Engagements

Likes

Performance Score.css-goub6s{font-size:var(--chakra-fontSizes-md);font-weight:500;color:var(--chakra-colors-gray-600);display:block;margin-top:var(--chakra-space-1);}Sam Millunchick's LinkedIn Performance

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