Bitcoin dominance remains high: Altcoin season index sluggish and market divergence intensifies

The cryptocurrency market in the first half of 2026 has exhibited an unprecedented structural characteristic: Bitcoin continues to stay at high levels, while the altcoin sector as a whole faces pressure, and the divergence between them is widening. As of April 15, 2026, according to Gate market data, Bitcoin’s price is $74,025, with a market capitalization of approximately $1.33 trillion, and a 24-hour price change of -0.54%. However, more noteworthy are the changes at the market structure level—Bitcoin’s dominance remains around 58.5%, the altcoin season index is only 34/100, well below the 75 threshold for “altcoin season.” K33 Research recently issued a report warning that liquidity in small-cap tokens is continuously drying up, and the traditional “altcoin season” may face structural challenges.

Overall Pressure on the Altcoin Sector, Liquidity Crisis in Small-Cap Tokens

Since April 2026, the crypto market has continued the core pattern established earlier this year: under the dual support of macro uncertainty and institutional funds, Bitcoin remains relatively stable, while the altcoin sector faces ongoing liquidity contraction. The latest reading of CoinMarketCap’s Altcoin Season Index is 34/100, which measures the performance of the top 100 altcoins over the past 90 days relative to Bitcoin—an index below 25 typically indicates strong Bitcoin dominance, while above 75 signals an “altcoin season.” The current 34 reading is in a neutral to slightly low range; from a technical perspective, the market still falls within the “Bitcoin season,” with a considerable distance from genuine capital rotation.

Meanwhile, Bitcoin’s market share remains high at about 58.5%. Since the approval of the US spot ETF in 2023, Bitcoin’s dominance has rebounded from 45.6%, returning to a high of 59%–64% by late 2025 to early 2026. Although it has slightly declined since then, it generally hovers around 58%, indicating a persistent siphoning of market capital into Bitcoin. Over the past 13 months, the total market value of altcoins has seen outflows exceeding $209 billion, with approximately 38% of altcoins near historical lows.

From ETF-Driven Institutionalization to Macro-Hedging Dominance

To understand the current market structure, it’s necessary to revisit the beginning of this cycle. In the second half of 2023, news of institutions like BlackRock applying for spot Bitcoin ETFs marked a turning point, with Bitcoin’s market share surpassing 52%, initiating a more than two-year-long trend of dominance recovery.

By 2025, the core narrative shifted toward “institutionalization” and “macro-driven” factors. Continuous inflows into Bitcoin spot ETFs, increased corporate holdings, and the growing influence of macroeconomic data on the crypto market have gradually shifted Bitcoin from a “retail-driven” to an “institutional and liquidity-driven” asset. As of April 2026, Bitcoin’s market cap is approximately $1.44–$1.46 trillion, with dominance around 57%–59%, and the total crypto market cap is about $2.5–$2.55 trillion.

Meanwhile, the altcoin market has followed a very different trajectory. In June 2025, the altcoin season index briefly hit 78, but this high was short-lived and more related to Bitcoin’s price rally rather than genuine capital rotation. Subsequently, tightening macro conditions, escalating geopolitical tensions (such as US-Iran conflicts and the Strait of Hormuz situation), and ongoing token unlock pressures pushed the altcoin sector into a long-term downtrend.

By March 2026, the situation worsened further. According to data from CryptoQuant analyst Darkfost, over 40% of altcoins are near their all-time lows, exceeding the previous bear market peak of about 38%, making this cycle the worst recorded for altcoin performance.

Three Major Causes for High Bitcoin Dominance

Bitcoin’s dominance around 58.5% results from multiple structural factors working together.

First, institutional funds favor Bitcoin. Since the approval of Bitcoin spot ETFs, institutional capital has flowed predominantly into Bitcoin via ETF channels, establishing a stable demand base. Bitcoin’s high dominance—around 59% in early 2026—is underpinned by continuous institutional allocations within ETFs. Institutional investors tend to prefer assets with high liquidity, clear regulation, and compelling narratives, giving Bitcoin a clear advantage over altcoins in these dimensions.

Second, macroeconomic factors drive safe-haven demand. In April 2026, macro events such as US-Iran conflicts and the Strait of Hormuz blockade are the main influences on crypto prices, rather than protocol upgrades or new token launches. In this uncertain environment, investors tend to shift funds from highly volatile altcoins into Bitcoin and stablecoins, with Bitcoin playing a “digital gold” role amid macro pressures.

Third, fundamental changes in market structure are occurring. The previous market cycle driven by retail leverage speculation is weakening. Institutional participation now differs significantly—they are less likely to rotate from Bitcoin into small- and mid-cap altcoins after Bitcoin rallies, instead preferring to maintain allocations in mainstream assets.

Index Interpretation: The Multi-Dimensional Meaning of the Low Altcoin Season Index

The altcoin season index, currently around 34, can be understood from several perspectives.

Structurally, the index measures the performance of the top 100 altcoins over the past 90 days relative to Bitcoin. When the index exceeds 75, the market is considered to be in altcoin season; below 25, Bitcoin dominance is strong. The current 34 reading is in a neutral to slightly low zone, indicating that altcoins have yet to establish sustained relative strength.

Historically, the peak of this index occurred on September 19, 2025, reaching 78; the low was on April 25, 2025, dropping to 12. The current 34 is somewhat higher than the historical low but still far from the high, suggesting a slow recovery rather than a strong reversal.

Market implications show that, despite increased social media discussions about “altcoin season,” on-chain data indicates high exchange inflows for altcoins, and many major altcoins still face persistent selling pressure. A true altcoin season would require broader accumulation behavior, which is not yet evident in the current distribution-oriented market.

Liquidity Perspective: The Severe Constraints Facing Small-Cap Tokens

Liquidity drying up is the most severe challenge facing the altcoin sector today. Market data shows that on major exchanges, spot trading volume for altcoins dropped from nearly $50 billion in October 2025 to only $7.7 billion in March 2026—a decline of over 80%. During the same period, total trading volume across major exchanges shrank from a peak of $91 billion to $18.8 billion.

This trend directly causes liquidity in small-cap tokens to plummet. It is estimated that there are over 47 million tokens in circulation, with about 22 million on Solana, over 18 million on Base, and around 4 million on BNB Smart Chain. The vast supply of tokens further dilutes the limited liquidity, risking a “zombification” of many small projects—possessing market cap but almost no actual trading activity.

K33 Research’s analysis indicates that the altcoin market is becoming increasingly difficult to navigate, with fragmented narratives, liquidity shortages, and large-scale token unlocks creating significant obstacles.

Market Divergence and Three Judgments

K33 Research: Liquidity Drying Warning, Traditional Altcoin Season Unlikely to Recur

K33 analyst David Zimmerman, in a recent report, made a clear judgment: unlike meme coins, altcoins may not return in the familiar cycle pattern of 2020–2021, which has likely peaked. His core reasoning includes ongoing token unlock pressures—altcoins faced $4.3 billion in unlocks in May, $2.8 billion in June, and $3.2 billion in July, requiring substantial new liquidity to absorb these, thus exerting continuous selling pressure; narrative-driven mechanisms are losing effectiveness, with markets shifting focus to fundamentals like product-market fit, user growth, and token profitability; and the structural rise of stablecoins is shifting the landscape into payment infrastructure, occupying key use cases for retail and institutional users. K33’s main conclusion is that a broad rally of all altcoins under current conditions is unlikely, with capital concentrating into select winners rather than indiscriminately lifting all tokens.

DWF Labs: The Traditional Altcoin Season Is Disappearing

DWF Labs managing partner Andrei Grachev echoes a similar view. He states that the “altcoin season” driven by overall crypto market gains is becoming a thing of the past, due to factors like the surge in token numbers, limited participant scale, and the absorption of liquidity by crypto ETFs, which are reshaping market structure. Grachev further notes that institutional capital is now more inclined to allocate into Bitcoin, Ethereum, and tokenized real-world assets, further diverting attention and funds away from altcoins.

Selective Revival: Some Structural Opportunities Remain in Altcoins

Not all analyses are pessimistic. Some observers believe that the 2026 altcoin market is not “dead,” but rather “evolving”—shifting from widespread retail frenzy to professional selection. Capital rotation shows clear stratification: liquidity is not flowing into all assets simultaneously but following a path from Bitcoin to Ethereum and then to a few high-quality altcoins with strong narratives, while small-cap or fundamentally weak projects are likely to be abandoned. Specific sectors such as AI infrastructure, real-world asset tokenization, and decentralized physical infrastructure are seen as potentially attracting the most speculative and institutional capital during this cycle. Grayscale’s Q2 2026 watchlist notably expanded its coverage of AI projects from 7 to 10, indicating institutional focus on particular sectors.

Deep Structural Reshaping of the Altcoin Ecosystem

The current market divergence is profoundly reshaping the competitive landscape of the altcoin ecosystem.

Survival of the fittest accelerates. In 2025, over 11.56 million crypto projects “died,” accounting for 86.3% of all failed projects in the past five years. In Q4 alone, about 7.7 million tokens vanished. In a liquidity-scarce environment, projects lacking real utility and fundamentals face accelerated淘汰. Historical data shows that over a complete bull-bear cycle, more than 95% of small altcoins experience declines over 99%, with market caps shrinking, liquidity drying up, and eventual market removal.

Institutional preferences influence token selection. Through ETFs and other products, capital is naturally concentrated in compliant, mainstream assets, reinforcing the “rich get richer” effect. Grayscale’s latest watchlist shows funds are increasingly focused on top projects within public chains, DeFi, AI, and infrastructure sectors.

Narrative-driven capital rotation replaces broad bull markets. Experts generally agree that a widespread altcoin rebound is structurally “unlikely,” with gains concentrated in the top 1% of projects, while the remaining 99% face ongoing淘汰. Future capital rotation is expected to be shorter, more selective, and theme-specific.

Investor behavior is also shifting markedly: from speculation to fundamental analysis, with overall risk appetite decreasing and investment cycles shortening. Data shows that in 2025, the average rise period for altcoins was about 20 days, roughly two-thirds of the nearly 60 days seen in 2024.

Conclusion

The collective underperformance of altcoins relative to Bitcoin is not a short-term phenomenon but the result of multiple structural factors. Bitcoin’s dominance at 58.5%, the altcoin season index at only 34/100, and K33 Research’s warning about liquidity in small-cap tokens collectively depict a crypto market in deep transition.

For market participants, understanding this structural shift is more important than short-term price predictions. The market is shifting from a retail-driven “public frenzy” to an institution-led “selective allocation.” This means the investment logic is moving from “what will rise” to “what has real value”—fundamentals, network effects, revenue models, and institutional adoption are replacing narratives and sentiment as core measures of asset value.

Bitcoin’s high dominance now has profound structural causes, while the altcoin ecosystem is accelerating its淘汰 process. This divergence is both a challenge and a necessary phase in market maturation. Future opportunities are likely to belong more to those participants and projects capable of adapting to this structural transformation.