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

Responsible for driving the executive communications strategy for the Chief Information Officer (CIO) of Becton Dickinson (BD), one of the largest medical technology companies globally.

Technology and Global Services Communications Leader

ARJ Consulting

ARJ Consulting is a boutique agency that helps leaders design effective communication strategies while supporting employee well-being. This powerful combo drives productivity, reduces turnover, and enhances workplace culture.

Communication & Wellness Strategist / Professional Speaker

Host of the Fit to Lead Podcast

Restless Urban

RestlessUrban is the premiere wellness blog and marketplace for midlife adults who want to live healthier, happier, and more fulfilling lives. The company produces original programming, news, and events while delivering an online retail experience fueled by expert reviews, recommendations, and curated seasonal collections.

As a contributor, I provide custom content and material in the wellness space to support the Restless Urban brand.

Advisory Board Member & Contributor

FractionX

FractionX is a boutique agency that provides mid-market organizations with fractional experts in a variety of areas (technology, marketing, finance, wellness, sales and operations) to bring focus, expertise, and results to company growth initiatives.

As the Chief Well-Being Officer, I provide corporate clients with bespoke and off-the-shelf wellness programs to enhance employee engagement.

Founding Advisor / Fractional Chief Wellbeing Officer

Thrive Global

Thrive Global is an all-in-one platform to improve health outcomes and productivity.

As a contributing writer, I provide content aligned with well-being and health, including nutrition, mindfulness and movement.

Contributing Writer

Innovation Refunds

Innovation Refunds is a fintech start-up that assists small and medium-sized businesses with claiming the tax credits and government incentives they qualify for. 

In my role, I developed strategic communications plans for senior leadership. This included driving executive visibility initiatives (e.g., media training, interview preparation, production of CEO podcast series).

Director Corporate Communications

KPMG US

- Develop strategic communications plans for senior leadership around transformation
- Promote workplace wellness through employee-run programs, such as Fit Club
- Led the firm's first-ever firmwide Being Well Together wellness challenge

Director, Communications

- Foster a high-performance culture while developing and driving strategic messaging and multi-faceted internal communications to support the Chief Financial Officer (CFO) and Operations. 
- Provide executive communications support and counsel for firm-wide, strategic and policy communications.

Associate Director, Internal Communications

Allison Jackson Fitness

- Serve as a wellness advocate and help corporate employees lose weight and reach their fitness goals through online fitness and nutrition programs
- Provide accountability to help busy, hard-working professionals reach their health and fitness goals. 
- Assist HR teams in bringing online group coaching programs to their employees
- Educate professionals on corporate wellness by learning how to eat better, incorporate effective workout plans and get healthy.

Wellness Expert & Speaker

Author of Flab to Fab in 8 Weeks: The Busy Mom's Guide to a Leaner Body & Healthy Eating

Verizon

Senior Consultant, Communications

Hertz

Director, Global Internal Communications

Manager, Executive Communications

Helping HR leaders and CEOs create unique wellness experiences. Fractional Chief Wellbeing Officer 🌟 Speaker🎤 Podcaster🎙️ Spiritual Wellness Advocate 🌞

💗I believe thriving workplaces start with clear communication and a culture of care. 

With 15+ years in internal comms and a deep passion for well-being, I bridge the gap between leadership goals, business outcomes, and employee needs.

🧘‍♀️ 𝗠𝘆 𝗠𝗶𝘀𝘀𝗶𝗼𝗻?

To help organizations and individuals prioritize wellness — through education, strategy, and sound.

✨ 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗼: 

🔹 𝗟𝗲𝗮𝗱 𝗲𝘅𝗲𝗰𝘂𝘁𝗶𝘃𝗲 𝗰𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗲𝘀 for the CIO and her technology organization in my full-time role, helping advance the world of health

🔹 𝗦𝗽𝗲𝗮𝗸 𝗮𝘁 𝗰𝗼𝗻𝗳𝗲𝗿𝗲𝗻𝗰𝗲𝘀, 𝗿𝗲𝘁𝗿𝗲𝗮𝘁𝘀 𝗮𝗻𝗱 𝗹𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 𝗼𝗳𝗳-𝘀𝗶𝘁𝗲𝘀 on workplace wellness, employee experience, and internal communication best practices

🔹 𝗛𝗼𝘀𝘁 𝗦𝗶𝗽 & 𝗦𝗼𝘂𝗻𝗱 𝗲𝘃𝗲𝗻𝘁𝘀—unique experiences that combine sound healing with wine tasting fundraisers for a one-of-a-kind mind-body reset -- feel good and do good

🔹 𝗪𝗿𝗶𝘁𝗲 𝘁𝗵𝗲 𝘽𝙚 𝙒𝙚𝙡𝙡 𝙒𝙚𝙚𝙠𝙡𝙮 𝗻𝗲𝘄𝘀𝗹𝗲𝘁𝘁𝗲𝗿, offering quick tips for calm, clarity, and connection

📈 Whether you 𝗻𝗲𝗲𝗱 𝗮 𝗱𝘆𝗻𝗮𝗺𝗶𝗰 𝘀𝗽𝗲𝗮𝗸𝗲𝗿 𝗼𝗿 𝗮 𝘄𝗲𝗹𝗹𝗻𝗲𝘀𝘀 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗳𝗼𝗿 𝘆𝗼𝘂𝗿 𝘁𝗲𝗮𝗺, I’m a comms expert and wellbeing warrior who “gets it.”

𝗟𝗲𝘁'𝘀 𝗖𝗼𝗻𝗻𝗲𝗰𝘁
💌 DM me or visit https://www.allison-jackson.com

𝗝𝗼𝗶𝗻 𝗠𝘆 𝗡𝗲𝘄𝘀𝗹𝗲𝘁𝘁𝗲𝗿: 𝗕𝗲 𝗪𝗲𝗹𝗹 𝗪𝗲𝗲𝗸𝗹𝘆
https://allisonjackson.beehiiv.com/subscribe

𝗔 𝗟𝗶𝘁𝘁𝗹𝗲 𝗔𝗯𝗼𝘂𝘁 𝗠𝗲
I’m a straight-talking Jersey Girl with a passion for helping employees thrive. When I’m not working, you’ll find me playing pickleball, spending family time with my husband and kids in Cape May, or walking my rescue pit bull, Winnie 🐾.

taplio

The Battle

Marcello Duarte Vieira

Allison (Goszka) Jackson 💗💫

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