There is a saying in the investment world that almost nobody questions: “Concentration builds wealth, and diversification preserves it.”
The first time I heard it, something clicked. Not because it told me to throw caution to the wind and bet everything on one thing — but because it finally gave language to something I had been feeling for years without being able to articulate it.
Most of us are handed the same script when we start investing. Spread your risk. Don’t put all your eggs in one basket. Diversify, diversify, diversify. And on the surface, that advice sounds responsible. It sounds safe. But I’ve come to believe that for most people who are trying to build wealth — not just protect it — that advice can quietly keep you stuck.
The Problem With Spreading Yourself Too Thin
Here’s what nobody tells you about diversification: when you spread your money across too many things too quickly, you also spread your attention, your energy, and your understanding. You end up with a portfolio you can’t really read, in assets you don’t really know, reacting to market movements you don’t fully understand.
That’s not investing. That’s hoping.
I’ve seen it happen. Someone puts money into crypto, real estate, stocks, ETFs, commodities, and three other things they read about online — all at the same time. They think they’re being smart. But when the market moves, they have no idea what to do. They panic. They sell at the wrong moment. They lose not because the investments were bad, but because they never had the depth of understanding to hold steady when things got uncomfortable.
The truth is, there is no safe investment. Every euro or dollar you put to work carries risk. Even keeping your money in a bank account is a risk — it’s just a quieter one. You are guaranteed to lose purchasing power against inflation. At least when you invest, you have a chance at a positive outcome. But only if you understand what you’re doing.
How I Actually Built My Portfolio
I didn’t start with a perfectly balanced, multi-asset portfolio. I started with crypto.
I started small, learned as I went, grew my knowledge, built my network, and gradually grew that position. I made mistakes. I also made gains. But more importantly, I built something that mattered more than returns: I built understanding. I knew what I owned, why I owned it, and what to expect from it.
Then came the moment of decision. I wanted to put a larger portion of my wealth to work — a meaningful amount, not just a small experiment. And when I looked at crypto honestly, I knew I wasn’t ready to put that kind of money there. The volatility was real. The uncertainty was real. So I pivoted.
I started buying real estate.
Not because someone told me to. Not because it was fashionable. But because I understood it. You have the physical asset — the stones, the building, the land. The value can fluctuate, but it will never go to zero. It gave me a foundation I could trust with more of my wealth. And from there, I kept building — layer by layer, asset class by asset class — always moving to the next thing only once I felt genuinely comfortable with what I already had.
The Real Question Is: Can You Sleep at Night?
This is the framework I come back to again and again, and it sounds simple, but it is surprisingly powerful.
When you invest a certain amount in a certain asset, can you still sleep soundly at night? Or are your investments quietly robbing you of your peace?
If the answer is no — if you’re checking prices at 2am, if a market dip sends your heart racing — then you’ve gone too far, too fast, in something you don’t understand well enough. That’s not a sign that investing is wrong. It’s a sign that you need to slow down and go deeper before you go wider.
My approach has always been: start with one asset class. Get comfortable. Not expert-level comfortable — just comfortable enough that you understand what you own, you know roughly what to expect, and the results you’re getting align with your expectations. Then, and only then, move to the next thing.
This is what intelligent concentration looks like. It’s not reckless. It’s not gambling. It’s the opposite of gambling — it’s refusing to put money into something you don’t understand, no matter how good it sounds.
Diversification Is Still Part of the Plan — But on Your Own Terms
I want to be clear: I am still diversifying. I still look for new asset classes to explore. I still move into new areas. But I do it on my own terms, at my own pace, and always guided by two things: my own growing understanding, and the people in my network.
That last point matters more than most people realise. Investing in your network and your knowledge is itself an investment — arguably the most important one. Surround yourself with people who are living the kind of life you want to build. Watch what they do. Learn from their experience. Let their guidance shorten your learning curve in areas where you’re still developing.
But never forget: it’s ultimately about you. Your risk tolerance. Your time horizon. Your ability to hold steady when markets move. Someone else’s perfect portfolio might be completely wrong for your life.
If you’re young and have time on your side, you can take more concentrated risk and recover if things don’t go as planned. If you’re closer to the stage of life where you want to protect what you’ve built, then yes — diversification becomes more important. The saying is right in that sense.
The key is knowing which stage you’re in, and being honest with yourself about it.
The Takeaway
Concentration and diversification are not opposites. They are different tools for different phases of your wealth journey.
Build first. Go deep on one thing. Understand it. Grow it. Then expand — deliberately, patiently, always staying within the boundaries of what you genuinely understand.
The investors who build real, lasting wealth are not the ones who spread the most. They are the ones who know the most about what they own — and who never let fear or excitement push them into something they can’t sleep with at night.
If you’re at the beginning of your investing journey and you want a structured way to build both the knowledge and the mindset, the Modern Wealthy programme is the resource I wish I had when I started. It gave me a framework for thinking about wealth that went far beyond any single asset class.
Start where you are. Go deep before you go wide. And always, always make sure you can sleep at night.
Want to go deeper? Read Why Your Brain Is Wired to Keep You Broke (And How to Rewire It) — because the biggest barrier to intelligent investing isn’t knowledge. It’s the mindset you bring to the table. And if you’re still waiting for the “right moment” to start, There Is No Perfect Time to Start Investing is worth a read too.
