The four-year rhythm of Bitcoin: anatomy of cycles, causes of crashes, and the future of patterns
The Four-Year Cycle: From Accumulation to "Bears"
The dynamics of Bitcoin's price follow well-studied patterns, central among which is the four-year cycle tied to the halving. This rhythm has become the foundation for trading strategies and market expectations.
A typical cycle begins with the accumulation phase. After the crash from the previous peak, volatility decreases, and large players ("whales") and long-term holders start methodically building positions, considering the asset undervalued. Retail investors, on the contrary, show minimal interest at this point, fearing prolonged corrections.
The next stage is the bullish trend, which often starts even before the halving itself. The market prices in the reduction of supply in advance, triggering an influx of liquidity and increased media attention. The halving itself often initiates parabolic growth, as retail investors, using high leverage, join the process en masse. This phase lasts 12–18 months and ends with a deep correction.
The bear market is characterized by a cascade of margin position liquidations, a particularly sharp decline in altcoins, and the dominance of pessimism. This stage ends with the formation of a bottom, when trader activity drops to a minimum, but infrastructure development continues.
The Nature of Sharp Crashes
Sudden price drops are an inherent feature of Bitcoin. Their root cause is the coincidence of several factors. The most common scenario is market overheating due to excessive leverage. Even a small downward movement triggers a cascade of margin calls, where forced sales to cover debts put pressure on the price, provoking new liquidations.
Global macroeconomics plays a critical role. Tightening monetary policy by central banks, especially the U.S. Federal Reserve, forces institutional players to reduce positions in risk assets. A vivid example is 2022, when, amid aggressive rate hikes, Bitcoin lost more than 60% of its value.
External shocks — from geopolitical events to unexpected regulatory decisions — can also trigger a crash. The mass sell-off in May 2021 following China's crackdown on mining, or the historic collapse on October 10, 2025, caused by trade tariffs, are clear confirmations of this.
The Role of the Halving and the Origin of Cycles
The concept of the four-year cycle is based on the halving — a programmed reduction of the mining reward by half every 210,000 blocks. This mechanism, embedded by Satoshi Nakamoto, artificially creates a supply shortage, which in the past served as a powerful catalyst for bullish phases. Each halving historically preceded strong growth, reinforcing Bitcoin's reputation as an asset with limited and predictable supply.
Psychology and Self-Fulfilling Prophecies
Cyclicality is also explained by market psychology. Unlike traditional assets, Bitcoin has no "intrinsic value" — its price is determined solely by participants' expectations. The more traders believe in the four-year cycle and trade according to its logic, the more accurately it reproduces itself. This is a classic self-fulfilling prophecy.
The End of the Cycle Era?
The growing dominance of institutional players — through ETFs, corporate reserves, and hedge funds — is changing the market structure. Their disciplined approach to buying and risk control reduces volatility. At the same time, Bitcoin is becoming increasingly tied to macroeconomic cycles, especially Fed policy, which weakens the influence of the halving.
The diminishing effect of the halving itself is also evident: each subsequent halving reduces the reward by a smaller absolute amount. In the current cycle, the all-time high was reached before the halving, and retail activity remains noticeably lower than in 2017 or 2021. This indicates that the familiar four-year pattern may be transforming under the pressure of new market realities.
My analysis: Bitcoin's four-year cycle is not a rigid law but a powerful historical trend, whose strength is gradually weakening. As the market matures and institutional capital arrives, the amplitude of fluctuations will decrease, and global macroeconomic conditions, rather than the halving, will become the key driver. However, the psychological factor and belief in the cycle will continue to exert influence, creating local price waves even in the new paradigm. Investors should prepare for less dramatic but more predictable movements.