Chapter 13: Stay Inside Your Circle of Competence#

Role: The Author (Direct Narrator)

Core Principle#

Success in one field does not grant competence in all fields. The graveyard of business is filled with successful people who ventured outside their expertise.

Know your boundaries. Respect them. Expand them slowly through learning, not leaps.

Deep Explanation#

I’ve watched a pattern repeat throughout my career:

A person becomes successful in their field. They’re celebrated as “brilliant.” Investors ask them to back other ventures. Friends pitch ideas. They start believing their own press.

They invest in restaurants, real estate, tech startups, crypto—anything except what made them successful.

Within a few years, they’ve lost more than they originally made.

The Competence Illusion:

Success creates a dangerous illusion: “I succeeded because I’m universally smart.”

Reality: “I succeeded because I understood one domain deeply.”

These are not the same.

The Samson Syndrome:

In the biblical story, Samson had supernatural strength—until his hair was cut. He lost his power without realizing it.

Business Samsons lose their power when they leave their domain. They don’t realize their “strength” was domain-specific, not universal.

A brilliant surgeon opens a restaurant and fails. A successful retailer invests in manufacturing and loses money. A tech entrepreneur buys a farm and goes broke.

They weren’t less intelligent. They were outside their competence.

Three Circles Framework:

Draw three concentric circles:

Circle 1: Competence (inner circle)

What you deeply understand
Where you have proven track record
Where you can evaluate opportunities accurately

Circle 2: Learning (middle ring)

What you’re actively studying
Where you’re gaining experience
Not yet for major capital deployment

Circle 3: Ignorance (outer area)

What you don’t understand
Where you can’t evaluate risk
Where you will lose money

The Rule:

Invest heavily in Circle 1
Invest cautiously in Circle 2 (with learning intent)
Never invest in Circle 3 (no matter how exciting)

How to Expand Your Circle:

Your competence circle can grow—but slowly, deliberately:

Study first. Read, learn, talk to experts before committing capital.
Start small. Make tiny investments to learn, not to earn.
Partner with experts. If you must enter a new field, partner with someone who knows it.
Accept the learning tax. Your first investments in a new area will likely lose money. Budget for this.

Warren Buffett famously avoided tech stocks for decades. He didn’t understand them. When he finally invested in Apple, it was after years of study—and it became his largest position.

That’s how competence circles expand: slowly, deliberately, with humility.

Real Cases#

Case 1: The Manufacturer Who Lost It All

A manufacturing entrepreneur built a $50 million business making auto parts. Brilliant at his craft.

Then he got excited about real estate. “How hard can it be?” he asked.

He bought 20 rental properties in 18 months. He didn’t understand:

Local market dynamics
Property management
Tenant laws
Maintenance costs

Within 5 years:

12 properties foreclosed
$15 million in losses
His manufacturing business was leveraged to cover real estate debts

He lost both businesses.

“I thought success was transferable,” he told me. “It’s not. I was a beginner pretending to be an expert.”

Case 2: The Investor Who Stayed in His Lane

A different entrepreneur made his fortune in software. During the dot-com boom, everyone was investing in everything: restaurants, retail, biotech.

He was offered dozens of deals. He said no to almost all of them.

“I only invest in software companies where I can evaluate the technology and the team,” he said.

During the crash, he lost nothing. While others went bankrupt, he had dry powder to buy distressed assets—in his industry, at prices he understood.

He’s now worth 10x his peers from that era.

Not because he was smarter. Because he knew his limits.

Action Checklist#

Define your competence circle. Write down: What industries do you deeply understand? Where do you have track record? Be honest, not aspirational.
Audit your current investments. Are any outside your competence? If yes, create an exit plan.
Create a “no” list. What types of investments will you automatically decline? (Crypto, restaurants, franchises, etc.)
If expanding, do it slowly. Choose one adjacent area to learn. Study for 6 months before committing significant capital.
Find circle mentors. For any new area, identify 2-3 people who are experts. Learn from them before investing.
The newspaper test: If you can’t explain the investment to a smart 12-year-old in simple terms, you don’t understand it well enough.

Flywheel Connection#

This is the Boundary Flywheel’s primary defense.

Staying in your competence:

Prevents catastrophic losses (most wealth destruction comes from outside bets)
Enables better decision-making (you spot risks others miss)
Builds on existing knowledge (compound expertise)
Protects all other flywheels (one bad bet can undo years of progress)

Venturing outside without preparation is the fastest way to reset your wealth flywheel to zero.

Golden Quote#

“The richest graveyard is filled with successful people who died outside their competence. Stay in your lane. Get rich there.”

Practice Exercise#

The Circle Map: Draw three circles (Competence, Learning, Ignorance). List every current and potential investment. Place each in the appropriate circle. Be brutally honest. If more than 20% is in Ignorance, you’re at risk.
The “No” List: Write down 5 types of investments or business ventures you will automatically decline, regardless of potential return. Post this where you’ll see it before making decisions.
The Learning Plan: Choose one adjacent area you’d like to expand into. Create a 6-month learning plan: books to read, experts to interview, small experiments to run. No significant capital deployment until month 7.

End of Chapter 13