Ask anyone who has spent years around bitcoin to name the market’s one organizing idea and you will hear the same phrase: the four-year cycle. Boom, brutal drawdown, long quiet accumulation, new boom, in a rhythm that has loosely tracked the halving calendar since the beginning. It is the closest thing this market has to folklore backed by data, and like all folklore, it deserves to be laid out precisely, dated, and then questioned.
This guide does all three. The companion references are Bitcoin Halving Dates for the supply schedule itself and Bitcoin Price History for the full price table; here the subject is the pattern.
What the cycle has looked like, in numbers
The observed structure: each halving cuts new supply in half, as explained in What Is the Bitcoin Halving; within twelve to eighteen months the market has set a dramatic new high; a drawdown of 70 to 90 percent follows; the trough forms roughly a year later, and the market grinds quietly toward the next halving. Four rounds of data, figures rounded, dates as recorded:
| Cycle | Halving | Following peak | Approx. gain, halving to peak | Subsequent trough | Peak-to-trough drawdown |
|---|---|---|---|---|---|
| 1 | Nov 28, 2012 (~$12) | ~$1,150 (Nov 2013) | ~95x | ~$170-200 (Jan 2015) | ~-85% |
| 2 | Jul 9, 2016 (~$650) | ~$19,700 (Dec 2017) | ~30x | ~$3,200 (Dec 2018) | ~-84% |
| 3 | May 11, 2020 (~$8,700) | ~$69,000 (Nov 2021) | ~8x | ~$15,500 (Nov 2022) | ~-77% |
| 4 | Apr 20, 2024 (~$64,000) | ~$116,000 (within the year before Oct 2026) | ~1.8x so far | open | -29% as of Oct 15, 2026 |
Two trends inside the table are as important as the pattern itself. The amplitude is shrinking: each cycle’s multiple is smaller and, through cycle three, each drawdown shallower, consistent with a maturing asset. And cycle four has behaved differently from the start: the only cycle to set a new all-time high before its halving, in March 2024, with the first US spot ETFs as the visible driver.
The explanations, from mechanical to skeptical
Why would such a pattern exist at all? Three families of explanation, in descending order of comfort.
The supply story. The halving mechanically halves the flow of new coins miners must sell. If demand merely holds, reduced issuance tightens the market with a lag, and the lag matches the observed twelve-to-eighteen-month run-ups. Tidy, and increasingly weak on arithmetic: by the 2024 halving, daily issuance had fallen to roughly 450 coins against daily trading volumes in the tens of billions of dollars; at October 2026 prices near $82,300, the entire annual issuance is on the order of $13 billion, small next to a single month of ETF flows at their 2024-25 peaks, covered in Bitcoin ETF Flows. The supply cut is real; its direct weight shrinks every cycle.
The reflexive story. The cycle persists because enough participants believe in it: the halving acts as a coordinating clock for attention, media coverage and positioning, and the pattern partially self-fulfills until crowded expectations unwind it. This explanation is unfalsifiable and probably partially true, which is exactly the problem.
The macro story. Bitcoin’s booms coincided with global liquidity expansions, 2013, 2017, the 2020-21 stimulus era, and its busts with tightening. In this reading bitcoin is a high-beta liquidity asset whose four-year rhythm roughly rhymed with monetary conditions by coincidence, and the halving is a narrative passenger. The correlation record examined in Bitcoin Correlation gives this story real support, especially for 2020-2022.
Honest verdict: three cycles of clean pattern is a sample of three. All three stories fit the past; none has earned the right to predict.
Where in the cycle are we now? The instruments, not the clock
The orthodox clock reading for October 2026, thirty months after the fourth halving, would say: post-peak drawdown phase, trough historically due within a few quarters. The ETF-era caveat is that the old clock may simply not govern a market whose marginal buyer is an advisor allocating retirement money rather than a retail wave; cycle four’s muted amplitude, a 1.8x halving-to-peak against cycle three’s 8x, and its so-far shallower 29 percent drawdown both point that way, though a sample of one proves nothing.
This is why the Radar’s position is to watch state rather than calendar. The instruments that have historically described cycle position, regardless of dates: MVRV and realized price, which flagged every prior peak and trough zone; the long and short term holder split, which shows whether patient money is accumulating or distributing; exchange reserves for coins moving toward or away from sale; and dominance, which tends to rise, as it did toward 60 percent this October, when risk appetite drains from the sector’s long tail.
How to use the cycle without being used by it
Three disciplines fall out of the data. First, expect drawdowns as a feature: every cycle, without exception, has included a decline most investors would call a catastrophe, and survival of them is the entry fee documented in Bitcoin Price History. Second, distrust precision: anyone selling exact cycle tops or dated price targets is selling the one thing four data points cannot support; the restrictions this site operates under exist for that reason. Third, if the cycle framework tempts you toward timing, note that its own historical lesson cuts the other way, which is the logic behind the approach in Dollar Cost Averaging Bitcoin.
On the radar
The four-year cycle is bitcoin’s best-documented pattern and its least-guaranteed future. Treat it as a map of how this market has breathed, not a timetable of when it must. The instruments above update continuously; the newsletter reads them twice a week; and the next cycle, whatever shape it takes, will be judged here against the table, with dates.