Crypto market cycles, sentiment and the Fear and Greed Index
Booms, busts and market mood, measured honestly.
Crypto prices have moved in big boom-and-bust cycles: Bitcoin has fallen more than 75% from its peak four times. Some link the timing to Bitcoin's four-yearly halvings, but four examples can't prove a rule. The Fear and Greed Index turns market mood into a 0–100 score from volatility, momentum, social media and search trends. It describes the mood; it doesn't predict prices.
The pattern people call a cycle
Bitcoin's price history has repeated a rough shape: a long climb, a burst of excitement and new all-time highs, then a fall of 75% or more over about a year, followed by a long, quiet bottom. Each time, much of the rest of the crypto market fell even harder. The table shows every fall of more than 70% from a peak, measured on daily closing prices.
| Peak | Peak price | Low | Low price | Fall | Peak to low |
|---|---|---|---|---|---|
| June 8, 2011 | $29.03 | November 18, 2011 | $2.11 | −93% | 163 days |
| April 9, 2013 | $230.68 | July 6, 2013 | $66.34 | −71% | 88 days |
| December 4, 2013 | $1,135 | January 14, 2015 | $175.64 | −85% | 406 days |
| December 16, 2017 | $19,641 | December 15, 2018 | $3,185 | −84% | 364 days |
| November 8, 2021 | $67,542 | November 9, 2022 | $15,758 | −77% | 366 days |
Daily closing prices (00:00 UTC) from Coin Metrics, July 2010 to May 23, 2026. After the high of $124,824 on October 6, 2025, the deepest close in the data set was $63,495 on February 5, 2026, a fall of −49%.
The halving story, and its limits
Several of those peaks came 12 to 18 months after a Bitcoin halving, when the number of new bitcoins created per block is cut in half. That's why many people talk about a "four-year cycle." But there have only been four halvings, each in a very different world: the 2024 halving came months after US spot ETFs launched, and Bitcoin set a new high before the halving for the first time. Four examples are far too few to make a rule, and the pattern may already have changed. Nobody knows when or whether the next peak or bottom comes.
Sentiment: why cycles overshoot
Crypto has no earnings or cash flows to anchor a price, so mood plays a big part. Rising prices draw in new buyers and leverage, which pushes prices higher; when it turns, forced liquidations and panic selling feed the fall. That feedback is why moves overshoot in both directions, and why "this time is different" is said at every top and "crypto is dead" at every bottom. See why is crypto going down and is crypto dead.
The Fear and Greed Index
The Crypto Fear and Greed Index from Alternative.me boils market mood into one number from 0 (extreme fear) to 100 (extreme greed), updated daily. It covers Bitcoin only. Its published inputs are:
| Input | Weight | What it measures |
|---|---|---|
| Volatility | 25% | Current volatility and drawdowns against 30- and 90-day averages (higher volatility reads as fear) |
| Market momentum and volume | 25% | Current volume and momentum against 30- and 90-day averages |
| Social media | 15% | Bitcoin-related posts and how much interaction they get |
| Surveys | 15% | Weekly polls; listed as paused, so the live weights differ |
| Dominance | 10% | Bitcoin's share of the crypto market |
| Trends | 10% | Google Trends data for Bitcoin searches |
CoinMarketCap publishes a separate fear and greed index with its own method, so the two can disagree on the same day.
- It's a summary of recent price action and attention, so it mostly tells you what the price already did.
- The weights and inputs are chosen by the publisher, and one input (surveys) is paused.
- "Be greedy when others are fearful" sounds simple, but readings can stay in extreme fear while prices keep falling for months.
- It's not a timing tool, and nothing here is a suggestion to buy or sell.
Frequently asked questions
What is the crypto Fear and Greed Index?
A daily 0–100 score from Alternative.me summarizing Bitcoin market mood from volatility, momentum and volume, social media, surveys, dominance and Google Trends. 0 is extreme fear, 100 extreme greed.
Does crypto move in four-year cycles?
Bitcoin's past has shown a rough four-year rhythm tied to halvings, but with only four halvings so far and very different conditions each time, it's a pattern noticed after the fact, not a law.
How far has bitcoin fallen in past bear markets?
From each major peak, daily closes fell 93% (2011), 85% (2013–2015), 84% (2017–2018) and 77% (2021–2022).
Is extreme fear a good time to buy?
Nobody can say. Fear readings have come both near bottoms and well before them. The index describes mood; it doesn't predict prices.
Where to next
Sources
- Coin Metrics free daily network data, PriceUSD (GitHub archive, CC BY-NC 4.0)
- Crypto Fear & Greed Index: methodology (Alternative.me)
- Fear and Greed Index (CoinMarketCap)
- Controlled supply and halvings (Bitcoin Wiki)
Written for beginners and checked against the sources listed. Last reviewed November 5, 2026. This page is educational and is not financial, tax or legal advice. How we write and check pages.