Bitcoin Four Year Cycle Explained
Bitcoin is down about 51% from its all-time high. The Bitcoin four year cycle says that is completely normal. In fact, if you line up every major top and bottom in Bitcoin’s history, the same pattern shows up over and over: a big run, a brutal crash, a slow grind, then a bottom nobody believes is real. It has happened four times. The timing is almost suspiciously consistent.
Here is what the four year cycle actually is, why it keeps repeating, and what it says about where we are right now.
What is the Bitcoin four year cycle?
Since 2011, Bitcoin’s price has moved in roughly four-year waves. Each wave follows the same basic shape:
- The run-up. Price climbs for about 12 to 18 months after the halving, eventually going parabolic near the top.
- The crash. Price falls 70% to 85% over about a year. This is the part that makes headlines and scares everyone out.
- The grind. Price chops sideways at the bottom for months. Volume dries up. Nobody wants to talk about Bitcoin.
- The recovery. Price slowly builds back, then the next halving happens and the whole thing starts again.
That cycle, from top to top or bottom to bottom, takes almost exactly four years each time. Not a few months off. Not vaguely similar. The dates land within weeks of each other.
The full scoreboard: every top and bottom
Here is every cycle, with real dates and real prices:
- Cycle 1 top: November 30, 2013, at $1,127. Bitcoin had gone from under $100 to over $1,000 in a single year.
- Cycle 1 bottom: January 2015, around $152. That is an 86% crash from the top.
- Cycle 2 top: December 16, 2017, at $19,665. The ICO boom, mainstream mania, your uncle asking you about Bitcoin at Thanksgiving.
- Cycle 2 bottom: December 2018, around $3,200. An 84% crash. The Fear and Greed Index spent weeks pinned in Extreme Fear.
- Cycle 3 top: November 10, 2021, at $69,044. Meme coins, NFTs, leveraged longs everywhere.
- Cycle 3 bottom: November 2022, around $15,500. FTX collapsed, and almost nobody believed Bitcoin would recover.
- Cycle 4 top: October 6, 2025, at $126,198. ETF-driven institutional money pushed the price to a new record, then the cycle turned.
Top to top: roughly 4 years each time (2013 to 2017, 2017 to 2021, 2021 to 2025). Bottom to bottom: 2015 to 2018, 2018 to 2022, each roughly 3.5 to 4 years. The crashes from top to bottom have lasted about 363 to 410 days.
Why does the four year cycle happen?
The most common explanation is the Bitcoin halving. Every four years, the amount of new Bitcoin created per block gets cut in half. That is a real supply shock: miners who were selling a certain amount of Bitcoin every day to cover costs suddenly have half as much to sell. If demand stays the same or grows, the math points in one direction.
But the halving alone does not explain the crashes. The other half of the cycle is human behavior. After a big run, everyone is over-leveraged, over-confident, and over-exposed. When the first crack appears, liquidations cascade. Leverage unwinds. Late buyers panic. The same greed that pushed the price up now pushes it down just as hard.
So the cycle is really two forces working together: a supply event (the halving) sets the stage, and human psychology does the rest.
Where we are right now
Bitcoin topped at $126,198 in October 2025. As of today, it sits near $62,000, roughly 51% below that high. The Fear and Greed Index is at 23, deep in Extreme Fear. The daily trend is down. Funding rates on futures exchanges show shorts paying longs, which means the crowd is leaning bearish.
If you overlay the previous cycles, this is almost exactly where you would expect to be. The crash phase after each top has lasted about a year. Every single time, the crowd says the cycle is broken, Bitcoin is dead, and this time is different. And every single time so far, Bitcoin has come back and made a new all-time high.
Does that guarantee it happens again? No. Past patterns do not promise future results. But four cycles of the same behavior, with the same rough timing and the same crowd psychology, is a lot of repetition to ignore.
How to use the four year cycle (without pretending to be psychic)
The cycle is not a crystal ball. It does not tell you the exact bottom or the exact top. What it does is zoom you out. If you understand that bear markets have historically lasted about a year from the top, and that the grind phase is the part where most people give up right before the turn, you stop panicking at the wrong time.
The practical takeaway is simple: know which phase you are in. If every cycle has had a crash, a grind, and a recovery, then the crash is not a surprise. It is a feature. The people who do well over multiple cycles are the ones who expect the crash, survive it, and are still paying attention when the grind ends.
Common questions
What is the Bitcoin four year cycle?
A repeating pattern where Bitcoin runs up for about 12 to 18 months after each halving, crashes 70% to 85%, grinds sideways, and then recovers. From top to top, the cycle has taken roughly four years each time since 2011.
Why does Bitcoin follow a four year cycle?
The halving cuts new Bitcoin supply in half every four years, creating a supply shock. Human psychology does the rest: greed drives the run-up, and over-leverage drives the crash.
Is the Bitcoin four year cycle dead?
People ask this every cycle. The October 2025 top and the current crash are following the same rough timeline as the previous three cycles. The pattern has not broken yet, but past cycles do not guarantee future ones.
How long do Bitcoin bear markets last?
The crash from the top to the bottom has lasted between 363 and 410 days in each of the last three cycles, roughly one year.
Where are we in the Bitcoin cycle right now?
Bitcoin topped in October 2025 and is about 260 days into the decline as of June 2026, down roughly 51% from the all-time high. Historically, the bottom has come after about a year.
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