Bitcoin's Maginot Line: From Halving Failures to Power-Law Test

Writing by: Liu Jiaolian

1. A phenomenon that confuses old investors

Bitcoin halving is the most classic story in the crypto world.

Every four years, miners’ rewards are halved, reducing new coin supply. Past three halvings have shown that after halving, a grand bull market follows.

2012 halving, increased over 90 times. 2016 halving, nearly 30 times. 2020 halving, over 7 times.

Then comes the April 2024 halving.

From about $63k at halving to the peak of $125k in October 2025, the increase is only 97%. Less than double.

Alex Thorn, head of research at Galaxy Digital, said something very significant: The fourth cycle is dramatically weaker than previous ones.

Seeing this, the first reaction of the blockchain community is: Is the old script of halving no longer effective?

2. Not just the smaller gains

If you look carefully, the change is not only in the gains.

Volatility has also decreased. In April 2020, Bitcoin’s 30-day volatility once surged to 9.64%. In this round, it never exceeded 3.11%. According to Bitbo data, it’s currently about 1.75%.

The dips are shallower too. Previously, bear markets would often see 80%, 90% drops. This round, from $125k down to $60k, a decline of just over half.

Zack Wainwright, research analyst at Fidelity Digital Assets, also noticed this change. He said that with institutional funds coming in, the market is indeed more stable than before.

Stability is good, but it also means that the old method of blindly buying and waiting for doubles may no longer work.

3. What’s different this round

Many attribute the smaller gains and lower volatility to the halving itself losing effectiveness. But the blockchain community thinks it might be more complicated.

The most direct reason is that this round already saw a rally before the halving.

In January 2024, the US approved the first spot Bitcoin ETF. This news directly pushed Bitcoin from over $40k to over $70k in March, setting a new historical high.

The halving occurred in April. That means most of the positive effects were already realized before the halving.

This is the first time in history that the price surpassed previous highs before the halving. In previous cycles, it took a long time after halving to reach new highs.

So, starting from $42k before ETF approval in January 2024, to the high of $125k, the increase is about 197%. Although not as high as 761% in 2020, it’s better than 97%.

But no matter how the statistics are adjusted, the overall trend of decreasing gains remains unchanged.

4. A deeper question

At this point, the blockchain community wants to ask a deeper question:

If gains are decreasing step by step, and dips are also narrowing, does Bitcoin’s cycle pattern still exist? If so, in what form will it present?

There is a model that the community has mentioned many times—the power law model.

This model suggests that Bitcoin’s price does not grow exponentially, but according to a power law. What does that mean? Exponential growth is 1, 2, 4, 8, 16, doubling faster and faster. Power law growth is also 1, 2, 4, 8, 16, but each doubling takes increasingly longer.

Specifically for Bitcoin, the price roughly follows the 5.7th power of time. The lower boundary of this channel is the lower edge, and historically, each bear market bottom touches or briefly dips below it.

This has been confirmed three times in 2015, 2018, and 2022.

Many have thus formed a belief: the lower boundary is a solid bottom, and when it’s reached, it’s time to buy the dip.

5. The warning from the Maginot Line

But the community also recalls a historical lesson.

Before 2022, there was a similar belief in a solid bottom. People said: Bitcoin’s bear market bottom has never fallen below the previous cycle’s all-time high. $20k is a solid bottom, unbreakable.

What happened? In June 2022, Bitcoin dropped below $18k. The solid bottom was breached, and the faith shattered.

The Maginot Line is a similar story. France built a formidable defensive line, but the German army bypassed it through the Ardennes Forest, encircling without firing a shot.

What the community wants to say is: when everyone believes a line is unbreakable, it’s often the most vulnerable.

Will the power law lower boundary repeat the same mistake? 2026 might be the year the answer is revealed.

6. The 2026 time window

The power law lower boundary is not static; it moves upward every day.

Based on its upward speed: by February 2026, the lower boundary will be about $52k; by April 2026 (now), about $56k; by the end of October 2026, about $65k; by the end of December 2026, about $70k.

The key window is in the fourth quarter of 2026.

If the price drops near $65k then, it would be a textbook bottom of the bear market—touching the power law lower boundary, with the historical pattern still valid.

If it drops below $60k, it would break through the lower boundary, and the model would fail for the first time.

CryptoQuant’s analysts forecast the solid bottom at $55,000–$60k. This range coincides with the position after breaching the lower boundary.

7. Touching vs breaking through, the difference is huge

Touching the lower boundary and breaking through it are two different things.

Touching the lower boundary (around $65k) has happened at every bear market bottom in history. The model allows for brief dips below, as long as it recovers. If it only touches and then rebounds, the power law model remains valid.

Breaking below ($60k or less) would be the first time the price breaches the model’s lower limit. If the closing price stays below the boundary for several weeks, the model is considered invalid. This suggests Bitcoin’s growth pattern might have changed—from a power law to another function?

The originator of the power law model, Santostasi, emphasizes that the model should be falsifiable. If the price falls below the boundary and stays there for a while, the model should be rejected.

This is not the end of the world; it’s scientific progress.

8. Has the era of 80% deep bear markets already passed?

Back to the halving topic.

To fall 80%, the price would need to drop from $125k to $25k. That would far breach the power law lower boundary, the 200-week moving average, and all historical supports.

Most current institutional and model forecasts suggest the most pessimistic target is around $40,000–$50k. Almost no serious analysis points to $25,000.

Has the era of an 80% deep bear market likely already ended?

In Q4 2026, if the price hits around $65k and touches the lower boundary, it would be a textbook bear market bottom. If it briefly breaks below $60k, it would be the twilight of the power law model, but not the end of Bitcoin.

A 60% decline might be the limit of future bear markets. It’s the price of a maturing asset, and also a sign of maturity.

9. Some thoughts from the community

First, halving has not failed, but its role has changed. Previously, halving was the main driver of bull markets; now, it’s just one of many factors. Macro interest rates, ETF inflows, institutional demand—these are becoming more influential.

Second, the power law lower boundary is not the Maginot Line. It might be broken, or it might not. Don’t bet on it as an unbreakable bottom.

Third, the 2022 breach of the $20k previous high teaches us: all seemingly unbreakable defenses are often breached when least expected.

Fourth, models are tools, not beliefs. The community may reference the power law, but won’t blindly follow it. Ultimately, decisions depend on one’s own judgment of fundamentals, liquidity, and macro environment.

Fifth, whether or not the lower boundary is broken, the era of an 80% deep bear market might already be over. Bitcoin is transforming from a casino into an asset. Less excitement, more stability.

In Q4 2026, let’s wait and see.

References:

[1] Vince Quill, “Current BTC Price Action Shows Dramatic Underperformance: Analyst”, Cointelegraph, Apr 19, 2026

[2] Bitbo, “Bitcoin Volatility Index”, accessed Apr 20, 2026.

[3] Fidelity Digital Assets, research note on Bitcoin drawdowns and institutional impact, 2026.

[4] Giovanni Santostasi, “The Bitcoin Power Law”, various analyses, 2020-2026.

[5] CryptoQuant, 2026 year-end Bitcoin bottom forecast.

[6] Jurrien Timmer, Fidelity Investments, research notes on Bitcoin key levels.