Investing in the Modern Era
There’s a particular kind of vertigo you feel in 2026 when you look at the markets. On one screen, an AI model writes code that would have taken a team a quarter. On another, a handful of companies have grown so large they practically are the market. And somewhere in your group chat, someone is either very rich or very ruined from a coin you’d never heard of last Tuesday. It can feel like the old rules have been repealed — like prudence is a relic and the only sin left is not betting big enough.
I want to make the opposite case. The modern era didn’t kill the timeless principles of investing. It amplified the need for them.
Educational, not financial advice. This essay is one person thinking out loud about ideas and history. It is not a recommendation to buy, sell, or hold anything. Your situation, time horizon, and risk tolerance are yours alone. Talk to a fiduciary who knows your numbers before you act.
Bogle was right, and 2026 proved it again
Start with the boring fact that keeps winning. In 2025, roughly 79% of active large-cap funds lost to the S&P 500 (per SPIVA). Stretch the window to twenty years and that figure climbs to about 92%. These aren’t amateurs — they’re professionals with Bloomberg terminals, research teams, and every incentive to win. And the index quietly beat almost all of them. Passive funds now hold the majority of fund assets, which means the world has finally, slowly, voted with its money for what Jack Bogle argued his entire life: cost and discipline beat cleverness over time.
But here’s the part that should rearrange how you think. The biggest enemy of your returns isn’t the market, and it isn’t the fund managers. It’s you. DALBAR’s research pegged the investor “behavior gap” — the difference between what the funds returned and what the average investor actually earned — at roughly 848 basis points in 2024. Eight and a half percentage points, evaporated, not by bad assets but by bad timing: buying high on excitement, selling low on fear, chasing the thing that already ran. Behavior matters more than intelligence. The smartest person in the room who panics in March underperforms the disciplined person who simply didn’t touch it.
This is the first principle and it is unglamorous: low cost, broad diversification, a long horizon, and the self-control not to flinch.
The exponential shift is real — and you might already own it
Now the other side, because this is where it gets genuinely interesting. We are living through what Ray Kurzweil and Peter Diamandis spent decades calling the exponential curve — the point where technology stops moving in straight lines and starts bending upward. In 2026 you can see it in the capex: hyperscaler AI spending exceeded $600 billion this year, with credible forecasts of crossing $1 trillion by 2027. That is not a marketing budget. That is a civilization re-tooling itself.
You can also see it in concentration. The “Magnificent 7” hit a record ~35% of the S&P 500 by early 2026 and drove roughly 42% of the index’s entire 2025 return. Seven companies, nearly half the gain.
Here’s the synthesis most people miss, and it’s the heart of this whole essay: if you own a broad index fund, you already own the exponential AI bet. You hold the Mag 7. You’re participating in the upside of the most important technological shift of our lifetimes — and you’re diversified across five hundred other companies that will catch the second-order benefits when AI makes them more productive too. You don’t have to choose between “bet the farm on the future” and “hide in old-school caution.” That’s a false binary the loudest voices online want to sell you.
The grown-up answer is core and satellite. Let a low-cost, diversified index be your core — the disciplined, Bogle-shaped majority of your portfolio that captures the exponential bet with a seatbelt. Then, if your situation allows, let a small, deliberate satellite express conviction in specific opportunities. The core is built to be held for decades. The satellite is money you’ve decided, in advance and in cold blood, that you could afford to be wrong about. The structure itself protects you from your own enthusiasm.
The dark side is also real
Optimism that won’t look at the downside isn’t optimism — it’s denial wearing a smile. So let’s look.
Crypto in 2026 is a genuinely mixed picture, and honesty requires holding both halves. The real structural change is the spot Bitcoin ETFs, now holding roughly $76–80 billion in assets (down from their earlier-2026 peak). That’s not hype; that’s institutional plumbing being laid, and it matters. But Bitcoin itself was down roughly 30% year-to-date as of mid-June 2026, volatile and deeply sensitive to macro winds. It is an interesting, maturing asset — and it is not a settled one. Anyone telling you it only goes up is selling something.
And then there’s the rot. In 2025, crypto scams took an estimated $11.37 billion — up 22% from the year before. AI-driven deepfake fraud added roughly $4.6 billion more, and it preyed hardest on the elderly, on the trusting, on people who heard a familiar voice on the phone that wasn’t real. Meanwhile a live debate rages over whether AI itself is a bubble — serious investors are shorting it, and some AI CEOs have openly conceded the market is “too excited.” None of that means the technology is fake. It means greed and fear are ancient, and every new gold rush imports the old con men along with the gold.
The lesson isn’t stay out. The lesson is stay sober. If something promises returns without risk, the risk is that you’re the product. Slow down. Verify. The deal that won’t survive a night’s sleep was never a deal.
Money in service of purpose
Underneath the tactics there’s a frame I can’t separate from how I think about any of this, and it isn’t a financial metric. Investing is stewardship. The money is not the point. The money is potential energy — the stored capacity to do something that matters, to provide for people you love, to be generous when generosity is hard, to build something that outlasts you.
That frame changes the questions. Greed asks how much can I get, how fast? Stewardship asks what is this for, and over what horizon? FOMO is the spiritual opposite of patience — it insists the train is leaving right now and you are a fool to be left behind. But abundance thinking, the real kind, says the future is not a fixed pie to be grabbed at; it’s something compounding and being built, and the disciplined participant gets to share in it without selling their peace to chase it. There will always be another train. There is only one you, and your composure is worth more than any single trade.
The exponential optimists are right that the long arc bends toward more — more capability, more abundance, more solved problems. The Bogle realists are right that the way you actually capture that arc is unglamorous: own broadly, keep costs low, hold through the noise, and don’t let either greed or fear make your decisions for you. These two truths are not in tension. They’re the same truth seen from two distances.
So here is the whole thing in a breath. Own the future through a diversified, low-cost core, so the exponential lifts you whether or not you guessed the winners. Express conviction only with a small, pre-decided satellite you could afford to lose. Refuse the scams and the FOMO with equal firmness. Treat your money as something you steward, not something you serve. And keep the horizon long — long enough that this year’s headlines, in either direction, stop being able to scare you.
The modern era is loud. The principles are quiet. Quiet wins.
Educational, not financial advice. Do your own diligence and consult a fiduciary before making investment decisions.