The Theorem of Modest Greed
If a £500 note were lying on the pavement, someone would already have picked it up
Economists de Mosy's Theorem of Modest Greed states a simple but devastatingly effective heuristic: you do not find £500 notes on the pavement. If one were there, someone would have picked it up. The logic transfers directly to investments, business opportunities, and get-rich-quick schemes: if an opportunity to make exceptional risk-free returns genuinely existed, other market participants with capital and information would already have exploited it — and in doing so, eliminated the opportunity.
This is the economic argument against virtually every get-rich-quick scheme: drop-shipping, certain crypto plays, 'passive income' courses, and leveraged schemes all follow the same logical structure. If the scheme worked as advertised, the person selling it would be doing it — not selling you a course about it for £997. The fact that they are selling you the course is direct evidence that the underlying opportunity has either closed, never existed, or is not what they claim.
Angner extends the argument to survivorship bias in business and investing narratives. The person on television explaining how they got rich from Bitcoin, drop-shipping, or a niche investment product took advantage of an opportunity that no longer exists. Their story is true but not replicable — because replication would require the same conditions at the same time, which you cannot access now. You are being shown the winner of a lottery and asked to buy the same ticket retroactively.
- Genuinely exploitable market inefficiencies are eliminated the moment they are discovered by anyone with capital.
- Anyone selling you a method to get rich is providing direct evidence that the method no longer works at scale.
- Survivor bias means you only hear from the winners — the thousands of failures are invisible.
- Business school narratives are not representative: they select for exceptional outcomes, not typical ones.
- The correct comparison class is everyone who was once in the same situation, not the one person who succeeded.
- Apply the pavement testAsk: if this opportunity were as good as claimed, why isn't everyone doing it? If the answer is 'most people don't know about it yet,' follow up: how did you find out, and why hasn't capital already flooded in?Pro tipThe more novel and obscure the opportunity sounds, the more vigorously you should apply this test.
- Ask why the seller is sellingIf the person promoting the scheme has genuinely found a reliable way to generate exceptional returns, they should be deploying capital — not selling you a course. The act of selling courses about an opportunity is strong evidence the underlying opportunity has closed.Pro tipThis test catches most internet schemes instantly. If the money is in the course, not the strategy, the strategy does not work.
- Find the failure rate, not just the success storiesFor any strategy or business model, find everyone who tried it, not just the one person presenting it. Drop-shipping, YouTube channels, property investment, day trading — all have visible success stories and largely invisible failure rates.Pro tipAcademic meta-analyses exist for most common investment strategies. They are far more informative than any individual's testimonial.WarningBusiness school case studies are selected for exceptional outcomes. They are the worst possible sample for making typical investment decisions.
- Check whether the conditions that produced the win still existEven genuine success stories often depend on timing-specific conditions that no longer obtain. Damian's YouTube channel succeeded partly due to a global pandemic creating enormous demand for financial content. That window is closed.WarningThe question is never 'did this work for someone?' but 'does this opportunity exist for me, now, given current conditions?'
Someone in the episode's discussion describes drop-shipping schemes: 'you just be the middleman, order for someone and then deliver it somewhere else, you can make loads of money.' The pitch is that most people don't know about it yet.
After-the-fact advice to invest in Bitcoin is presented as proof of the strategy. The people who made extraordinary gains from Bitcoin in early years are highly visible; the majority who bought at the wrong time are not.
Damian offers a self-deprecating account of his own success: he started a finance channel during a global pandemic, worked 100-hour weeks for four years, and is 'one of five' from his cohort still standing.
Angner attributes the theorem to economist de Mosy and encountered it in the academic economics literature on market efficiency. He presents it not as an abstract theorem but as a practical filter for the daily noise of get-rich schemes that arrive via email, YouTube ads, and business school case studies. His framing — 'if you found £500 on the floor you wouldn't go to a guy and go give me 20 quid I'll show you where there's £500 on the floor every day' — makes the logic viscerally obvious.