Lero
At Lero, he helps shape product direction, investor narrative, public positioning, and the marketing system that supports the company's next stage.
Founder biography
A young entrepreneur figuring it out
London Leffler started early, putting birthday money into crypto at eleven.
That curiosity turned into years of building across reselling, trading, marketing, and media, leading to the creation of multiple businesses.
The path has not been linear, but the approach remains the same: learn quickly, stay close to the work, and keep building.
3+
COMPANIES
11
AGE STARTED
5
INDUSTRIES
Current focus Today he is focused on LERO, Evolvant, and YouTube, applying years of experience in crypto, marketing, creator media, and product positioning to build stronger companies.
Present chapter At 20 has become a more public chapter, with greater responsibility, stronger judgment, and a focus on sharing the journey with young entrepreneurs.
What the current chapter looks like.
London Leffler builds purpose-driven companies focused on long-term value.
He operates across crypto, finance, marketing, and media, using each to strengthen and support the others.
Evolvant
At Evolvant, he builds systems that simplify influencer marketing and improve how creators, brands, and agencies collaborate and operate.
LPL Digital
At LPL Digital, he founded and led a performance-driven marketing firm for e‑commerce and online brands. He now advises on ongoing operations.
Media
On YouTube, he documents his entrepreneurial journey, sharing real experiences and building a brand around raw truth as a young entrepreneur.
Timeline preview
Timeline Snapshot
2017
Introduction to Crypto
Used birthday and early hustle money to enter crypto after discovering Bitcoin and Ethereum.
2018-19
Sneaker Resells & Trading
Reselling sneakers in person and online using bots, generating over $5,000 in profit while growing a crypto account through trading from $100.
2020
Loncards Takes Off
First major side hustle in sports card reselling, combining live breaks and online distribution to generate over $50,000 in revenue.
2021
Trading Becomes Obsession
A knee injury and isolation shifted trading from a hobby into a daily focus and growing obsession across crypto and stocks.
2022
Million-Dollar Hack
A major trading year ended with a multi-million dollar hack, leading to the decision to learn programming and security at a deeper level.
2023
The Marketing Era
Started YouTube to document the entrepreneurial journey while launching LPL Digital, a performance-driven marketing agency.
2024
Real-World Exposure
Graduated high school, landed larger marketing contracts with major brands, and interned at AllView Real Estate to learn the industry before investing.
2025
Expansion and New Ventures
LPL Digital expanded, Lero began, and Evolvant was founded, shifting the focus toward more structured and collaborative work.
2026
Leadership & Direction
Lero matured into a stronger company, while fundraising and building relationships became key skills, as Evolvant gained traction in the influencer marketing space and YouTube became a source of real entrepreneurial insight.
Select highlights
Three chapters that explain the tone of the whole story.
2020
The summer of boxes, breaks, and daily shipping runs.
Loncard Breaks was one of the first businesses that showed what scale could actually feel like. London was buying, repackaging, and selling cards on eBay, running live breaks on YouTube and Instagram, and turning a strong feel for market demand into real revenue.
Context
Over $30,000 in summer revenue, roughly $50,000 across the year, much of it built while still in the middle of the pandemic.
Why it mattered
It proved he could spot demand, build a brand around it, and do the unglamorous fulfillment work himself, right down to biking 20 to 30 packages to the post office.
2022
A major loss became a technical turning point.
After one of his strongest trading runs, London was socially engineered during the NFT cycle and lost holdings that would later be worth millions in present-day value. The loss was brutal, but the more important chapter was the response.
Turning point
Instead of staying stuck in the damage, he went deep on programming, Solidity, machine-learning ideas, and arbitrage systems so he would understand the infrastructure more completely.
Result
That period widened his technical lens and changed how he thought about security, systems, and the kind of companies worth building later.
2023-2025
Distribution became a real business, not just a personal skill.
YouTube, LPL Digital, and later contract-based promotional campaigns turned marketing into something more serious than a side skill. What started as affiliate experimentation became a real operating edge.
Proof of work
The channel grew to 50,000 subscribers by the end of 2023 and 81,000 by the end of 2025, helping establish credibility without leaning on empty personal-brand theatrics.
Longer view
The same period also set up Lero and Evolvant, where distribution knowledge, product instinct, and trust-building now have to work at a company level.
2023-2026
Audience, agency work, Lero, Evolvant, and a sharper executive lane.