Over the full 10-year stretch, Bitcoin vs index funds isn’t close — Bitcoin wins by an enormous margin.
But that answer changes completely depending on which 10-year window you pick, and the most recent stretch tells a very different story than the full decade does.
Here’s the actual data, both ways.
The Full 10-Year Number
Measured from mid-2016 to mid-2026, Bitcoin’s return has landed somewhere between roughly 9,300% and 13,500%, depending on the exact start and end dates used, per StatMuse’s historical price data. The S&P 500 over the same general window returned somewhere around 245–254%.
Looked at as compound annual growth rate from the end of 2015 to the end of 2025, Bitcoin delivered approximately 70% annualized, compared to roughly 13% annualized for the S&P 500, according to Spark’s historical performance analysis.
Neither number is a typo. Bitcoin vs index funds, measured this way, isn’t a close contest at all — one asset multiplied invested money by well over a hundred times, while the other delivered solid, unremarkable growth in line with its own long-term average.
It’s worth being precise about why the exact percentage varies so much between sources. Bitcoin’s price on any single day can swing by several percentage points, so a comparison that starts or ends even a few weeks apart can shift the headline return figure by thousands of percentage points, even though the underlying multi-year trend stays consistent. That volatility in the measurement itself is a small preview of the volatility covered in more depth further down.
The Same Comparison, Done as Regular Contributions
Lump-sum comparisons can be misleading, since almost nobody actually invests all their money on a single day. A dollar-cost-averaging comparison tells a similar story, though: putting $20 a week into each asset from March 2016 to February 2026, total contributions of $10,400 grew to roughly $164,348 in Bitcoin, versus roughly $22,973 in an S&P 500 index fund over the identical stretch, based on Untaught’s monthly price dataset analysis.
Same amount, same schedule, same discipline. The only variable was which asset absorbed the money.
Where This Flips: The Most Recent Years
Here’s the part most Bitcoin vs index funds comparisons leave out, and it matters enormously.
Look at just the last three years (2023–2026) instead of the full decade, and the index fund actually won: the S&P 500 returned about 33% over that window, versus roughly 21% for Bitcoin.
Zoom in further to 2025 alone, and the gap is starker still: the S&P 500 returned +17.9% for the year, while Bitcoin lost 6.3% over the same twelve months.
This isn’t cherry-picking a bad year to make a point. It’s the same pattern that’s shown up before — 2022 was brutal for both assets, but Bitcoin fell roughly 65% while the S&P 500 fell about 18%, a drop more than three times as steep, as detailed in Ledn’s historical drawdown analysis.
The pattern across all three of these shorter windows points to the same underlying dynamic: Bitcoin’s biggest wins tend to arrive in short, dramatic bursts, surrounded by longer stretches of underperformance or outright losses relative to the steadier index fund. Someone who happened to measure their own personal holding period starting right before one of those bursts would see numbers close to the extraordinary full-decade figure.
Someone who started measuring right after one, as the most recent few years illustrate, would see something much closer to, or even behind, the index fund’s own return.
The Volatility the Headline Number Hides
A single “which one won” number, whatever period it covers, doesn’t capture what it actually felt like to hold either asset along the way.
Bitcoin has repeatedly experienced drawdowns of 50% or more, with recovery periods that sometimes stretched over a year or more before prices returned to their prior highs. The S&P 500’s worst modern drawdowns have been real but shallower and generally shorter, historically.
One useful risk-adjusted measure: Fidelity Digital Assets calculated Bitcoin’s Sharpe ratio (a measure of return relative to volatility) at approximately 0.96 from February 2020 onward — a genuinely respectable figure, but one that reflects a bumpier ride than the S&P 500’s own long-run risk-adjusted returns, which have historically been steadier over comparable stretches.
There’s a behavioral dimension to this that pure return numbers miss entirely. A 50% drawdown that recovers within a year looks identical on a 10-year chart to one that takes three years to recover — but living through the second version, not knowing in the moment which one you’re in, is a meaningfully harder experience to hold through without selling.
The headline return figures above assume an investor held the entire way through every single one of those drawdowns without flinching, which is a much harder thing to actually do than it is to describe after the fact.
Why the Relationship Between the Two Is Changing
Bitcoin and the S&P 500 didn’t always move in any predictable relationship to each other — for years, they occupied almost entirely separate financial worlds.
That’s shifted. The launch of spot Bitcoin ETFs in January 2024 pulled Bitcoin more directly into mainstream portfolio construction — BlackRock’s IBIT reached roughly $100 billion in assets under management within 435 days, the fastest any ETF has ever reached that milestone.
As more institutional money flows into both asset classes side by side, the 30-day rolling correlation between them has become more variable: spiking during broad macro sell-offs (when everything falls together) and decoupling during crypto-specific rallies driven by their own separate catalysts.
That means Bitcoin vs index funds is no longer a comparison between two fully unrelated bets the way it may have looked a decade ago — the two are increasingly intertwined, even while their return profiles remain very different.
So Which One Actually Won?
The honest answer to the Bitcoin vs index funds question depends entirely on which window you’re asking about, and pretending otherwise is how misleading headlines get made.
Over the full 10-year stretch, Bitcoin’s outperformance has been so large that no reasonable methodology changes the outcome. Over the most recent three years, and especially over the most recent single year, the index fund actually came out ahead. Both of those facts are true at the same time, measured honestly from the same underlying data.
What doesn’t change across any window: the S&P 500’s roughly 10.5% long-run average return, dating back to 1957, has survived every recession, crash, and panic in modern financial history without a single losing 20-year stretch. Bitcoin’s extraordinary long-run number came with drawdowns exceeding 50% along the way, more than once.
A Practical Way to Think About This
- Don’t extrapolate the full 10-year number into a guaranteed future. Past performance over one specific decade, however dramatic, isn’t a promise about the next one.
- Check which window a “Bitcoin beats stocks” claim is actually using. The full 10-year figure and the most recent 3-year figure tell opposite stories — a source citing only one of them, without saying which, isn’t giving you the full picture.
- Weigh the drawdowns as seriously as the gains. A number like “70% annualized” sounds abstract until you remember it includes stretches where the same asset lost more than half its value.
- Most advisors who recommend any Bitcoin exposure suggest 5–10% of a portfolio, treating it as a volatility-tolerant hedge rather than a full replacement for a diversified index fund core.
- Remember that 90% of actively managed funds fail to beat a simple S&P 500 index over 15 years, per S&P’s own SPIVA scorecard — the index fund side of this comparison isn’t a weak baseline; it already beats most professional stock-picking on its own.
Questions Worth Answering
Does Bitcoin’s past 10-year performance mean it will keep outperforming for the next 10? No historical pattern guarantees that, and Bitcoin’s own recent 3-year and 1-year numbers show the outperformance isn’t constant even within the same broader decade.
Why did Bitcoin underperform in 2025 specifically? Multiple factors typically get cited — shifting rate expectations, profit-taking after a large prior rally, and rotation into other assets — but no single explanation is universally agreed upon, which is itself a reminder of how much short-term crypto price action resists tidy narratives.
Is it possible to get index-fund-like stability and Bitcoin-like upside at the same time? Not really — the two return profiles come from fundamentally different risk levels, which is exactly why blending a small Bitcoin allocation into a larger index-fund core, rather than choosing one exclusively, is the approach most advisors land on.
Does Bitcoin’s growing correlation with stocks reduce its diversification value? To some degree, yes, especially during broad market sell-offs when the two increasingly move together — the diversification benefit shows up more reliably during crypto-specific moves than during macro-driven ones.
Where I’ll Add My Own View
Everything above is measurable, sourced, and true regardless of anyone’s opinion of crypto. This last part is mine alone, and it’s offered as one person’s view, not a conclusion the data forces.
My own read is that real money from crypto tends to come from time in the market, not timing it — and that holding through a full decade, not a single good year, is what actually separates the people who built wealth from the ones who just caught a lucky few months. I don’t think that changes much if you’ve studied the space closely; someone who genuinely understands the technology, the cycles, and the risk can likely compress that timeline somewhat, since real knowledge lets you hold through the drawdowns that scare less-informed money out at the bottom. But I don’t think even deep study replaces years of it.
My honest sense is that truly getting comfortable with an asset this volatile — understanding it well enough to hold through a 65% drop without panic-selling — is itself something that takes close to a decade to fully absorb, the same way any hard skill does. That’s a personal impression, not a statistic, and it’s worth weighing exactly that way.
It’s also why I keep coming back to the same practical suggestion rather than a bolder one: study first, size the position to what a real drawdown wouldn’t wreck, and let time do more of the work than timing ever will.