From the 4-Year Cycle Perspective: Bitcoin Halving and the Time Code of Market Sentiment

In the world of digital currencies, bull and bear markets alternate like tides, with each cycle hiding deep market patterns. To understand when the true investment opportunities arise, first decipher the timing code of these market cycles. Based on historical data analysis, the crypto space generally completes a full bull-bear rotation approximately every four years, and the driving forces behind this cycle are worth exploring.

Why Do Bull Markets Last Four Years? Unveiling Historical Cycle Data

Examining the development of the cryptocurrency market reveals a clear timeline: the first major cycle from 2013 to 2017, the second from 2017 to 2021, and the third from 2021 to 2025. Each complete bull-bear cycle lasts about four years, and this is no coincidence.

Bull markets typically last from six months to a year, during which prices accelerate upward. In contrast, bear markets tend to be longer, often lasting 1-2 years or more. This asymmetrical time distribution reflects changes in market participant sentiment—rapid emotional surges followed by prolonged confidence rebuilding.

According to data patterns in the crypto market, Bitcoin generally takes about 33 months to initiate a new bull run. This timeframe is closely linked to market policy cycles, technological update cycles, and investor psychology cycles. Therefore, when you see a time span aligning with historical patterns, it often signals that a new bull market is brewing.

From 2013 to 2025: The Evolution of Three Bull Markets

The first major bull market was marked by events from 2013 to 2017. During this period, Bitcoin’s price soared from a few hundred dollars to over $20,000, fueled by speculation. Social media was abuzz with slogans like “To the moon,” and countless new investors rushed in, dreaming of overnight riches. This irrational boom ultimately led to a deep bear market in 2018-2019, with Bitcoin falling from its highs to a few thousand dollars, as the market began to purge bubble projects.

The second cycle saw a similar pattern. After the 2017 bear market, only projects with real strength gradually gained consensus. By 2021, a new bull run was underway again. Maturity in blockchain technology, the boom of DeFi ecosystems, and massive institutional inflows pushed Bitcoin to new heights.

The third cycle spans from 2021 to 2025. The severe bear market of 2023 still leaves market participants cautious, but by late 2024, the market shows signs of new vitality. As market patterns suggest, a new bull market begins as scheduled, with mainstream cryptocurrencies like Bitcoin gradually breaking key resistance levels. By 2026, we are in a critical phase of this cycle, with upward potential still unfolding.

Halving Effects and Sentiment Cycles: The Two Engines of Bull Market Initiation

Two core drivers propel the start of a bull market: the technical halving effect and the psychological sentiment cycle.

Bitcoin’s four-year halving mechanism is a key trigger. In mid-2024, Bitcoin completed its latest halving. Historically, after halving events, Bitcoin has experienced 10x or even greater price increases. The halving itself has a powerful narrative—limiting new supply, reinforcing scarcity expectations, and serving as a natural excuse for whales and institutions to position themselves.

Beyond technical factors, sentiment cycles are equally important. A complete bull market usually involves four stages of market emotion: first, the “accumulation phase” where funds quietly build positions; second, the “enlightenment phase” when early investors start to profit; third, the “mania phase” where FOMO (fear of missing out) peaks among the masses; and finally, the “top” when retail investors flood in, often leading to the market peak. Historical experience shows that when retail investors rush in en masse and FOMO reaches extremes, it often signals the end of the bull run.

Participant Dynamics: The Time Game of Whales, Institutions, and Retail Investors

Different market participants play distinct roles in the bull market, each following their own timing.

Whales are usually the earliest to enter. At the bear market bottom, when the market is bleak, whales quietly start accumulating. By early 2024, their positions are largely established, setting the stage for subsequent price rallies.

Institutions follow closely behind. As market sentiment warms, institutional funds flood in, marking the true start of the bull market. Their participation provides sustainable buying power and adds professionalism to the market.

Retail investors are typically the last to enter. When prices have already risen several times and market enthusiasm is high, retail investors rush in en masse. They often buy at the top, which is why most retail traders end up with losses—their timing is inherently disadvantageous.

Rational Approaches to Cycles: From FOMO to Long-Term Planning

Understanding the true meaning of market cycles isn’t about predicting exact peaks but about cultivating the right investment mindset.

First, recognize that bull and bear cycles are normal market phenomena, not anomalies. Avoid impulsive buying during short-term rallies or abandoning positions during dips. Based on the four-year regularity, you can develop a relatively long-term investment plan.

Second, beware of FOMO traps. When social media is flooded with “buy or miss out” messages, and everyone around you discusses a particular coin, it’s often the riskiest moment. True investment wisdom is to stay cautious when others are greedy and to remain patient when others are fearful.

Third, focus on fundamentals rather than just price increases. Choose projects with real utility, strong teams, and healthy ecosystems, which significantly increase the chances of genuine profits during bull markets.

Finally, adjust your strategy according to different market phases. In late bear markets and early bull phases, consider more aggressive positioning in quality assets; during mid-bull periods, gradually take profits; and in late bull stages, prepare for risk management and the next cycle.

Outlook for 2026: Signs of the Next Cycle

Entering 2026, with the ongoing effects of the previous halving and improved global liquidity, the potential for a bull market remains high. Many market observers expect substantial gains, though pinpointing the exact peak is impossible—that’s the market’s allure.

Continuous development of blockchain technology and the maturation of application ecosystems are making the crypto market more sophisticated and rational. Future investors need a deeper understanding—not only of the timing patterns of bull markets but also of the economic principles behind different cycles.

The recurring dance of bull and bear markets is an eternal rhythm of the crypto space. In this journey full of opportunities and challenges, those who can seize bull market opportunities while rationally navigating bear markets will ultimately achieve true wealth growth. Time is the best validator, and rationality and patience are the strongest tools to traverse cycles.