How Long Do Bitcoin Bull Cycles Last? What 12 Years Show
How Long Do Bitcoin Bull Cycles Last? What 12 Years Show
On 20 August 2026, Bitcoin closed back above its 200-day moving average and stayed there. By the definition CoinGecko uses in its study “How Long Do Crypto Bull Markets Last (2014 to 2026)”, published on 24 September 2026, that close ended a 290-day bear market and started Bitcoin’s eleventh bull cycle since 2014.
The obvious next question is how long this one will run, and how far. CoinGecko’s data offers tidy answers: an average of 237 days, and an average gain of +130.5% from start to peak. Those numbers are real, and they are worth knowing.
They are also easy to misuse. They rest on a mechanical definition, they depend on which outlier you leave out, and they come from a small sample of cycles whose returns have been getting smaller. Crypto is volatile, and a holder can lose a large share of their capital even inside a “bull market”. This article explains how the cycles are measured, what the data says, and why the averages work as context for a long-term holder rather than as a forecast.
Key Market Data
| Metric | Value |
|---|---|
| Bitcoin price, 28 Sep 2026 | about $83,000 to $84,500 |
| Current cycle start (20 Aug 2026 close) | $69,255 |
| Recent intraday high | above $87,000 (21 Sep 2026) |
| 200-day moving average | about $70,600 (23 Sep 2026) |
| All-time high | $126,198 (6 Oct 2025) |
| Preceding bear market | 4 Nov 2025 to 20 Aug 2026, 290 days |
| Completed bull cycles since 2014 | 10 |
| Average completed cycle length | 237 days (169 excluding 2015 to 2018) |
| Average gain to peak | +130.5% (9 cycles, excluding 2015 to 2018) |
| Max supply | 21,000,000 BTC |
| Last halving | 20 Apr 2024 (block 840,000) |
Data as of 28 September 2026. Verify before publishing.
1. How a Bitcoin Bull Cycle Is Defined
There is no official start date for a bull market. Every “the bull is back” headline is using somebody’s rule, and the rule decides the answer.
CoinGecko’s rule is simple and mechanical. A bull market is a period in which Bitcoin’s daily closing price stays above its 200-day moving average for 30 or more consecutive days. A bear market is the inverse. The 200-day average itself is a plain rolling mean of the previous 200 daily closes, which smooths out noise so the longer trend is visible.
Three features of that rule matter for everything that follows:
- It is backward-looking. A cycle can only be confirmed 30 days after it starts, so the start date is always known in hindsight.
- It uses closes, not intraday prices. A spike that fades before the daily close does not count.
- It measures gain to the highest close, not the intraday peak. That makes the published gains smaller than the “top tick” numbers you often see quoted.
The study covers daily closing prices from 1 January 2014 to 21 September 2026.
2. Every Bull Cycle Since 2014
Here is CoinGecko’s full table, ranked by gain from the 200-day crossing to the highest close in each cycle.
| Cycle | Start | End | Days | Gain to peak |
|---|---|---|---|---|
| 2015 to 2018 ICO and Halving Cycle Mania | 11 Oct 2015 | 5 Feb 2018 | 849 | +7,844.3% |
| 2020 to 2021 COVID Bull Run | 30 Apr 2020 | 19 May 2021 | 385 | +627.1% |
| 2019 ICO Bubble Recovery | 3 Apr 2019 | 26 Sep 2019 | 177 | +167.3% |
| 2023 to 2024 BTC ETF Debut Rally | 17 Oct 2023 | 4 Jul 2024 | 262 | +156.4% |
| 2024 to 2025 US Post-Election Rally | 15 Oct 2024 | 9 Mar 2025 | 146 | +60.8% |
| 2023 Post-FTX Recovery Rally | 14 Jan 2023 | 17 Aug 2023 | 216 | +57.7% |
| 2021 Peak of DeFi Summer Rally | 2 Oct 2021 | 13 Dec 2021 | 73 | +40.3% |
| 2025 $125K ATH Rally | 23 Apr 2025 | 17 Oct 2025 | 178 | +33.3% |
| 2015 Mini-Rally | 29 Jun 2015 | 18 Aug 2015 | 51 | +21.0% |
| 2026 Post-Bear Recovery Rally (current) | 20 Aug 2026 | Ongoing | 33+ | +17.3% (to 21 Sep) |
| 2020 Pre-COVID Mini-Rally | 29 Jan 2020 | 28 Feb 2020 | 31 | +10.8% |
Source: CoinGecko, “How Long Do Crypto Bull Markets Last (2014 to 2026)”, 24 September 2026.
The spread is the first thing to notice. The shortest completed cycle, the 2020 Pre-COVID Mini-Rally, lasted 31 days and gained +10.8%. The longest, the 2015 to 2018 run, lasted 849 days and gained +7,844.3%. The next longest was the 385-day COVID bull run. An “average” drawn from a range that wide describes almost none of the individual cycles.
The “$125K ATH Rally” label refers to the run that produced Bitcoin’s all-time high in October 2025. Its gain looks small because CoinGecko measures from that cycle’s own start price to its highest daily close, not from the bear market low.
3. What the Averages Say, and What They Hide
CoinGecko reports two duration averages. Across all 10 completed cycles, the average is 237 days. Excluding the 2015 to 2018 run, which it treats as an outlier, the remaining nine average 169 days, and CoinGecko suggests that figure is more representative of a modern cycle.
On gains, it reports an average of +130.5% across the nine completed cycles that remain after excluding 2015 to 2018. The current cycle is excluded because it is not finished.
Our own arithmetic on the same table shows how much those averages lean on a single cycle:
- Median gain of the nine cycles is +57.7%, less than half the +130.5% mean.
- Excluding the 2020 to 2021 COVID run as well, the average of the remaining eight falls to roughly +68%.
- Median duration of all 10 completed cycles is about 178 days, closer to the 169-day figure than to 237.
None of this makes CoinGecko’s numbers wrong. It shows that the headline average is being pulled upward by one or two extraordinary cycles, and that the choice of which outlier to exclude changes the story.
The $159,634 figure, and why it is not a target
CoinGecko also runs a piece of arithmetic: if Bitcoin gained the +130.5% average from the $69,255 start price, it would reach $159,634. That is a calculation, not a forecast, and CoinGecko itself qualifies it immediately, noting that gains have compressed noticeably since 2022 and that actual returns are likely to be lower than the historical average.
We include it only so readers who see it quoted elsewhere know where it comes from. It is not an expectation and it should not anchor any decision. The same logic applies to duration: adding 169 or 237 days to 20 August produces a calendar date, not a prediction.
4. Why Recent Bitcoin Bull Cycles Are Smaller
The clearest pattern in the table is compression. The last four completed cycles, in time order, gained +57.7% (2023 Post-FTX Recovery Rally), +156.4% (2023 to 2024 BTC ETF Debut Rally), +60.8% (2024 to 2025 US Post-Election Rally) and +33.3% (2025 $125K ATH Rally). None came close to the +167.3% of 2019 or the +627.1% of 2020 to 2021.
CoinGecko’s interpretation is that Bitcoin’s growing market capitalisation and institutional participation may be dampening the size of each rally. That is a reasonable hypothesis, and it fits basic arithmetic: moving a much larger asset by the same percentage requires far more new capital. But it is an interpretation, not an established finding. The sample is small, and several other things changed over the same period, including interest rates, the arrival of spot ETFs and a much larger derivatives market.
What the data does support is narrower and more useful: recent cycles have delivered smaller gains than early ones, and a holder who expects 2020 style returns from the current cycle is betting against the most recent evidence.
5. Where the Current Cycle Stands
The current cycle began at a close of $69,255 on 20 August 2026. By CoinGecko’s cut-off of 21 September, it was 33 days old and up +17.3% on a closing basis. At the end of September it is about 40 days old.
You may have seen a different figure, that Bitcoin is “up more than 25%” since the cycle began. Both numbers can be true because they measure different things. Bitcoin briefly traded above $87,000 on 21 September, an eight-month high, which is roughly 26% above the $69,255 start. The +17.3% figure is measured to the highest daily close in CoinGecko’s data. Intraday highs always flatter the picture; closing prices are the more conservative measure, and they are what the cycle table uses.
Since then the price has cooled. Bitcoin opened 28 September at $84,457 and traded down to about $83,000 later that morning. That is still well above the 200-day moving average, which sat near $70,600 on 23 September, so by CoinGecko’s definition the cycle remains intact.
The August move had a large mechanical component, which we covered in our breakdown of the $3 billion Bitcoin short squeeze. That matters for reading the cycle start: a crossing driven by forced short covering is a weaker signal than one driven by steady spot buying.
6. How Sensitive Is the 200-Day Method?
A 200-day average and a 30-day confirmation rule are sensible choices, but they are choices. Change them and the dates move.
- Other analysts use other lines. CryptoQuant dates bull markets from a close above the 365-day moving average, which Bitcoin reclaimed around 22 September 2026, about a month after CoinGecko’s start date. Same market, two different “first days”.
- The rule leaves unclassified gaps. In CoinGecko’s own table, the 2025 ATH rally ends on 17 October 2025 while the following bear market is dated from 4 November 2025. Choppy stretches around the average belong to neither.
- Closes versus intraday prices change both the start dates and the gains, as the 17% versus 26% example above shows.
- The 30-day threshold filters out false starts but guarantees that every cycle is confirmed late.
The practical takeaway is to treat any cycle date as approximate. Its value is in describing trend regime, not in timing entries.
7. What the Cycle Data Cannot See
The table measures price only. It says nothing about why each cycle happened or what is different this time. Three structural factors sit outside it.
Supply schedule. Bitcoin’s supply is capped at 21 million coins. The most recent halving, on 20 April 2024 at block 840,000, cut the block reward from 6.25 to 3.125 BTC. The next is expected around April 2028. Many holders frame cycles around halvings, but the current cycle began more than two years after the last one, and CoinGecko’s method does not reference the halving at all.
Institutional demand. Spot Bitcoin ETFs are now a central channel for new money. In the week of 21 September 2026, US spot Bitcoin ETFs took in more than $2 billion of net inflows according to Farside Investors data, including about $999 million on 21 September alone, the largest single day of 2026. Flows like these can support a cycle, but they are not locked in: ETF holders can redeem as easily as they buy.
Corporate treasuries and leverage. Listed companies that hold Bitcoin on their balance sheets add a new kind of holder whose behaviour depends on their own share price and funding. We explored that risk in The MSTR Trap.
8. Bull and Bear Case
š Bull Case
- Bitcoin is holding well above its 200-day average, roughly 17% above it at the end of September, so the cycle has room before it is technically threatened.
- Spot ETF demand has returned strongly, with a record single day for 2026 on 21 September.
- A second, independent method (CryptoQuant’s 365-day average) now also signals a bull regime.
š» Bear Case
- Recent cycle gains have compressed sharply, and the last completed cycle gained only +33.3% on a closing basis.
- Part of the cycle start was driven by forced short covering rather than steady spot demand.
- ETF demand can reverse quickly, since spot ETF holders can redeem as easily as they buy.
- Four of the 10 completed cycles lasted under 150 days, so a short cycle is historically common, not unusual.
- Bitcoin still sits roughly a third below its October 2025 all-time high, and macro headwinds such as a strong dollar and higher bond yields were weighing on crypto in late September.
9. What a Long-Term Holder Can Actually Use
The cycle history is useful in three limited ways. It sets expectations: bull cycles have lasted from one month to more than two years, so anyone assuming a specific end date is guessing. It tempers return assumptions: recent cycles have delivered tens of percent, not hundreds. And it reminds you that every cycle so far has ended, usually with a meaningful drawdown.
What it cannot do is tell you when this cycle ends or where the price will be when it does. For most long-term holders, a steady plan that does not depend on calling the top, such as the approach we compare in Grid Trading vs DCA, is more robust than a strategy built on an average. Holding securely matters too; our guide to Bitcoin cold wallet myths covers the custody mistakes that cost holders more than any cycle.
What would change the picture: a sustained close back below the 200-day average would, on CoinGecko’s rule, end the cycle; a prolonged period of ETF outflows would undermine the institutional demand argument; and a cycle that clearly breaks the compression trend would weaken the “dampening” hypothesis.
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FAQ
How long do Bitcoin bull markets usually last?
Using CoinGecko’s 200-day moving average definition, the 10 completed Bitcoin bull cycles since 2014 averaged 237 days. Excluding the unusually long 2015 to 2018 cycle, the average falls to 169 days. Individual cycles have ranged from 31 to 849 days, so the average is a rough guide only.
When did the current Bitcoin bull cycle start?
By CoinGecko’s definition, it started on 20 August 2026, when Bitcoin closed above its 200-day moving average at $69,255 and then stayed above it for at least 30 days. Other analysts use different rules; CryptoQuant, which uses a 365-day average, dated its signal about a month later.
What is the average gain in a Bitcoin bull market?
CoinGecko calculates an average gain of +130.5% from the start of a cycle to its highest close, across nine completed cycles excluding 2015 to 2018. The median of those nine is much lower, at +57.7%, and the last four completed cycles gained between +33.3% and +156.4%.
Will Bitcoin reach $159,634 in this cycle?
There is no basis for expecting it. The $159,634 figure is simply CoinGecko applying the +130.5% historical average to the $69,255 start price, and CoinGecko itself notes that recent gains have compressed and actual returns are likely to be lower. It is arithmetic, not a price target.
Why are Bitcoin bull runs getting smaller?
CoinGecko suggests Bitcoin’s larger market capitalisation and greater institutional participation may be dampening rallies, since moving a bigger asset takes more capital. That is a plausible interpretation rather than a proven cause, and it is based on a small number of cycles.
Is Bitcoin still in a bull market?
At the end of September 2026, yes by CoinGecko’s definition. Bitcoin traded around $83,000 to $84,500 on 28 September, well above its 200-day moving average of about $70,600. A sustained close below that average would end the cycle under the same rule.
Conclusion
Bitcoin’s return above its 200-day moving average on 20 August 2026 marks a real change in trend, and CoinGecko’s history gives useful context for it. Cycles have typically lasted months rather than years, and recent ones have produced gains measured in tens of percent rather than hundreds.
The biggest opportunity is that the cycle is young, sits well above its 200-day average, and is supported by returning ETF demand. The biggest risk is treating a historical average as a promise, when the sample is small, the method is mechanical, and the most recent cycles point to smaller outcomes. A sustained break below the 200-day average, or a lasting reversal in institutional flows, would change the picture. For a long-term holder, the cycle table is a map of what has happened, not a schedule of what will.
Disclaimer:
This article is for educational and informational purposes only. It does not constitute investment, financial, legal or tax advice, and it is not a recommendation to buy, sell or hold any digital asset.
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