Few markets swing as dramatically as crypto. Bitcoin has gone through several periods in which its price multiplied many times over, each followed by a collapse in which it lost most of that gain. These repeated booms and busts are often called crypto market cycles, and they have become a central part of how crypto traders think.
Understanding cycles is useful. Treating them as a timetable is dangerous. This guide explains what is known about crypto cycles — the role of Bitcoin's halving, the typical phases of a cycle, and what drove past booms and busts — and then explains why history is a weak guide in a market that is still young and changing quickly.
What is a market cycle?
A market cycle is a recurring pattern of rising and falling prices, driven by changes in supply, demand and sentiment. Every market has cycles, but in mature markets they are usually long and partly hidden by many other factors. Crypto cycles have been unusually visible because the market is young, heavily driven by sentiment, and — in Bitcoin's case — shaped by a supply schedule fixed in its code.
Bitcoin's supply schedule and the halving
Bitcoin was described in Satoshi Nakamoto's 2008 white paper, Bitcoin: A Peer-to-Peer Electronic Cash System. New bitcoins are created as a reward to the miners who add new blocks to the blockchain, roughly every ten minutes.
That reward is cut in half every 210,000 blocks — about every four years. This event is called the halving (covered in full, including the next halving and its effect on miners, in the Bitcoin halving explained):
| Year | Block reward after halving |
|---|---|
| 2009 (launch) | 50 BTC |
| 2012 | 25 BTC |
| 2016 | 12.5 BTC |
| 2020 | 6.25 BTC |
| April 2024 | 3.125 BTC |
Because the reward keeps halving, the total supply approaches but never exceeds 21 million bitcoins. Each halving reduces the rate at which new supply enters the market.
Why halvings get attention
The argument is straightforward: if demand stays the same while the flow of new coins halves, there is less new supply for buyers to absorb. Miners, who often sell newly minted coins to cover costs, also have less to sell.
Historically, each of the earlier halvings was followed within roughly one to two years by a major bull market. That observation is the origin of the popular "four-year cycle" idea.
Why the halving is not the whole story
The halving is predictable — everyone knows years in advance when it will happen — so markets can anticipate it. And each past cycle also coincided with other powerful forces: waves of new investors, changes in global interest rates and liquidity, new products, and regulatory news. With only a handful of halvings in history, it is impossible to separate the halving's effect from everything else that was happening at the same time.
The four phases of a cycle
Market cycles are often described in four phases. These are descriptions of behaviour, not precise stages you can identify in real time.
1. Accumulation
After a long decline, prices move sideways at low levels. Sentiment is poor, media attention is minimal, and many former participants have left. Patient buyers gradually accumulate. Volatility often falls.
2. Markup
Prices begin rising in a sustained trend. At first the rise is quiet; later, as prices make new highs, attention returns, new buyers arrive and the trend accelerates. This is the phase in which trend-following approaches tend to perform best.
3. Distribution
Prices are high and volatile. Sentiment is euphoric — media coverage, social-media excitement and stories of overnight wealth are common. Earlier buyers sell into the enthusiasm. Price may make a final spike higher or move sideways in a wide, choppy range.
4. Markdown
Selling overwhelms buying and prices fall, often sharply. Leverage built up during the boom is unwound through forced liquidations, which accelerates the fall. Sentiment turns to fear and then to indifference, setting the stage for a new accumulation phase.
A brief history of Bitcoin's major cycles
The pattern has been visible several times, although the details have differed each time.
- 2013: Bitcoin rose from low double digits to over $1,000 by the end of the year, then fell sharply through 2014–2015.
- 2017–2018: Bitcoin rose to nearly $20,000 in December 2017 amid a wave of new tokens and retail interest, then fell to around $3,200 by December 2018 — a decline of more than 80%.
- 2020–2022: After the 2020 halving and a period of very loose global monetary policy, Bitcoin reached about $69,000 in November 2021. It fell to around $15,500 in November 2022, during a period of rising interest rates and the collapse of several large crypto firms, including the exchange FTX.
- 2024: In January 2024 U.S. regulators approved spot Bitcoin exchange-traded funds, giving traditional investors a new route into the asset. The fourth halving followed in April 2024, and Bitcoin passed $100,000 for the first time in December 2024.
Each cycle's peak was followed by a drawdown of roughly three-quarters or more. Each bear market lasted around a year from peak to trough. These are striking similarities — but with only a few examples, they are observations, not laws.
Altcoins in the cycle
"Altcoins" — cryptocurrencies other than Bitcoin — have tended to follow Bitcoin's broad direction, but with bigger swings. In past bull markets, money often flowed first into Bitcoin, then into Ethereum, and later into smaller and more speculative coins as enthusiasm spread. In bear markets the process reversed, and smaller coins frequently fell further than Bitcoin.
There is an important difference between Bitcoin's history and that of many altcoins: a large number of tokens that were prominent in one cycle have lost almost all their value and never recovered. A cycle that brings Bitcoin back to new highs does not bring back every coin. For traders, that means altcoin positions carry an extra layer of risk — the risk that the asset itself fails — on top of cyclical volatility.
Sentiment gauges traders watch
Because cycles are driven so heavily by crowd behaviour, many traders track measures of sentiment. Common examples include:
- Funding rates on perpetual futures. When traders using leveraged long positions pay high funding to short sellers, it shows strong bullish positioning — and a market vulnerable to liquidation cascades if price drops.
- Composite "fear and greed" indexes, which combine measures like volatility, momentum and social-media activity into a single score.
- Search and social-media interest, which has tended to surge near euphoric peaks.
- Exchange inflows and outflows, read by some as signs that holders are preparing to sell or are moving coins into long-term storage.
Each of these describes positioning or mood; none reliably marks a turning point. They are most useful as reasons to be more careful when readings are extreme.
Why history may not repeat
Several things are different now from earlier cycles:
- The market is larger. Moving a much larger market requires much more capital, which may dampen the size of booms.
- New participants. Institutional investors and exchange-traded products change who is buying and why.
- Diminishing halving impact. Each halving removes a smaller amount of new supply in absolute terms, relative to the total already in circulation.
- Widespread awareness. When everyone expects a pattern, they act early, which can change the pattern itself.
- Macroeconomic sensitivity. Crypto prices have become more sensitive to interest rates and global risk appetite.
The honest conclusion is that cycles are a useful lens for understanding how crypto markets have behaved, not a tool for predicting when they will turn.
What traders can actually use
Rather than trying to time cycle peaks, traders can use cycle thinking to adapt their approach to the conditions in front of them.
Identify the current regime, not the calendar
Use price structure on higher timeframes. A market making higher highs and higher lows above a rising long-term moving average is in an uptrend regardless of where it is in a supposed four-year schedule. A market below a falling long-term average, making lower highs, is not. Our guide to multi-timeframe analysis explains how to read this.
Adjust risk to volatility
Crypto volatility changes dramatically across phases. Use a volatility measure such as the Average True Range to set stop-loss distances, and reduce position size when volatility rises so that the money at risk per trade stays constant. See our risk management guide and our explainer on why crypto is so volatile.
Watch sentiment as a warning, not a signal
Extreme euphoria and extreme fear have accompanied past turning points, but markets can stay euphoric or fearful far longer than expected. Treat extremes as a reason to tighten risk, not as a trigger to bet on a reversal.
Be especially careful with leverage
The markdown phases of past cycles were accelerated by forced liquidations of leveraged positions. The U.S. Commodity Futures Trading Commission warns that virtual currency markets can be highly volatile and that trading them carries significant risk. Leverage multiplies that risk.
Write down your plan for each regime
Decide in advance how your trading changes in each condition — for example, which setups you take in an uptrend, whether you trade at all in a choppy range, and how much smaller your positions become when volatility doubles. Writing it down before the market moves stops the euphoria or fear of the moment from rewriting your rules. Our guide to writing a trading plan shows how.
A worked example
Imagine a trader who noticed that a halving occurred some months ago and assumed a bull market "must" follow, buying with large size and no stop-loss. If the market instead moved sideways for a year, the trader's capital would be tied up and exposed to sharp drops throughout.
A trader using regime-based thinking would instead wait until price structure on the weekly chart confirmed an uptrend — higher highs, higher lows, price above a rising long-term average — then take smaller positions with defined stops, adding only as the trend confirmed itself. They might miss the earliest part of a move, but they would not be betting on a calendar.
Key takeaways
- Bitcoin's halving cuts new supply in half roughly every four years; total supply is capped at 21 million.
- Past halvings were followed by major bull markets, but each cycle also had many other drivers.
- Cycles are often described in four phases: accumulation, markup, distribution and markdown.
- Past bear markets saw drawdowns of roughly three-quarters or more — but a handful of cycles is not enough to make reliable predictions.
- Trade the regime you can see on the chart, adapt position size to volatility, and be cautious with leverage.
Continue with the Bitcoin halving explained and Bitcoin price history, compare the two largest assets in Bitcoin vs Ethereum, or see live crypto prices on the RumiEX markets page.
Frequently asked questions
What is the Bitcoin halving?
The halving is a pre-programmed event, roughly every four years (every 210,000 blocks), that cuts the number of new bitcoins created per block in half. It has happened in 2012, 2016, 2020 and April 2024, when the block reward fell from 6.25 to 3.125 BTC.
Does the halving cause bull markets?
Past halvings were followed within roughly a year or two by large price rises, but correlation is not causation. Many other factors — liquidity, interest rates, new investors, regulation and new products — influenced each cycle. There is no guarantee that future halvings will be followed by similar moves.
How long does a crypto bear market last?
Historically, major Bitcoin bear markets have lasted roughly one year from peak to trough, with prices falling by around three-quarters or more. But the sample is very small — only a few cycles — so these patterns should not be treated as rules.
Can I predict the top of a crypto cycle?
No one can reliably predict tops or bottoms. Indicators that seemed to mark past tops have often failed in later cycles. Risk management — position sizing, stop-losses and avoiding excessive leverage — matters far more than timing calls.
Do altcoins follow the same cycles as Bitcoin?
Most large cryptocurrencies have tended to move in the same broad direction as Bitcoin during major cycles, often with larger swings in both directions. Individual coins can also collapse permanently, so they carry additional risk beyond the cycle.
Sources and further reading
Written and reviewed by the RumiEX Editorial Team. This article is for education only and is not financial, investment or tax advice. Read our editorial standards.