Bitcoin (BTC) Dominance Surges Past 54% While Altcoins Falter: Is an Altcoin Season Rally Imminent?

According to @CryptoMichNL, the crypto market exhibited a stark divergence in the first half of 2025, with Bitcoin (BTC) propping up the market while altcoins experienced significant downturns. Data from TradingView shows that while the total crypto market cap grew by a mere 3%, BTC climbed 13%. In contrast, Ethereum's ether (ETH) fell 25%, Solana (SOL) dropped 17%, and an index of smaller tokens plunged 30%. Gregory Mall of Lionsoul Global highlights that Bitcoin's dominance has now exceeded 54%, a level that has historically preceded major altcoin rallies. Mall attributes BTC's strength to institutional inflows from spot ETFs, which have surpassed $16 billion year-to-date, and optimism surrounding potential central bank rate cuts. Signs of a potential rotation into altcoins are emerging, as evidenced by ETH's 81% rally since its April lows and a 31% recovery in DeFi total value locked to over $117 billion, according to DeFiLlama. However, analysts from Bitfinex caution that the upcoming quarter has historically been the weakest for Bitcoin, suggesting a period of range-bound price action. Further supporting the bullish case for BTC, analyst Kevin Tam notes that ETF demand in the past year (approximately 500,000 BTC) has outstripped newly mined supply (164,250 BTC) by a factor of three.
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Bitcoin's Ascent Highlights a Divided Crypto Market
The first half of the year painted a deceptive picture of calm across the broader cryptocurrency market. While the total market capitalization, as measured by TradingView, edged up a mere 3% to $3.27 trillion, this figure masks a significant underlying divergence. Bitcoin (BTC) has been the primary engine of growth, single-handedly propping up the market with a respectable 13% gain. This performance stands in stark contrast to the rest of the digital asset space, which has faced considerable headwinds. Ethereum (ETH), the second-largest cryptocurrency, experienced a sharp 25% decline, while other major Layer-1s like Solana (SOL) fell by nearly 17%. The pain was even more acute for smaller, more speculative assets; the OTHERS index on TradingView, which tracks cryptocurrencies outside the top ten, plummeted by a staggering 30%. This performance gap highlights a flight to perceived safety within the crypto ecosystem, with capital consolidating into Bitcoin as macroeconomic uncertainties persist. As of recent trading sessions, BTC/USDT was trading around $109,076, demonstrating continued strength and holding key psychological levels.
Institutional Inflows and Macro Tailwinds Fuel BTC's Rally
The resilience of Bitcoin can be attributed to several key factors, most notably a surge in institutional adoption and a favorable macroeconomic outlook. According to Gregory Mall, Chief Investment Officer at Lionsoul Global, the approval and subsequent success of spot Bitcoin ETFs have been a game-changer. These investment vehicles have seen cumulative inflows exceeding $16 billion year-to-date, absorbing a significant portion of the available supply. This demand isn't just from U.S. investors; as noted by analyst Kevin Tam, institutional adoption is expanding globally. For instance, Canadian pension fund manager Trans-Canada Capital recently disclosed a $55 million investment in spot Bitcoin ETFs. This institutional accumulation, which also includes corporate treasury purchases by firms like MicroStrategy, creates a powerful demand-side dynamic. This trend is further supported by growing optimism around potential interest rate cuts from the Federal Reserve, which typically boosts risk assets like Bitcoin.
The Altcoin Conundrum: Is a Market Rotation on the Horizon?
While Bitcoin thrives, altcoins have been left behind, leading to a rise in Bitcoin dominance to over 54%, up from 38% in late 2022. Historically, such periods of BTC outperformance have often preceded a broader altcoin rally, or "altseason." Gregory Mall points out that during the 2017 and 2021 cycles, significant altcoin runs lagged Bitcoin's new all-time highs by two to six months. Early signs of this rotation may already be emerging. Ethereum, for example, has staged an impressive 81% rally from its April lows. The ETH/BTC pair, a key indicator of this rotation, has also shown strength, climbing 1.33% to 0.02351000. Furthermore, activity in the decentralized finance (DeFi) sector is rebounding. According to data from DeFiLlama, the total value locked (TVL) in DeFi protocols has surged past $117 billion, a 31% increase from its April slump. This suggests that capital is beginning to flow back into higher-risk crypto assets, with traders potentially looking for the next narrative in Layer-1s and DeFi applications.
Navigating the Second Half: Conflicting Signals for Traders
Looking ahead, analysts are divided on the market's immediate trajectory. On the bullish side, Joel Kruger, a market strategist at LMAX Group, notes that July has historically been a strong month for crypto, with average returns of 7.56% since 2013. He believes the broader setup remains encouraging, especially as the crypto treasury strategy expands beyond Bitcoin to assets like ETH. However, analysts at Bitfinex have issued a note of caution, warning that the third quarter has historically been the weakest for Bitcoin, averaging only 6% gains. They anticipate a period of "range-bound price action" with subdued volatility. This suggests traders may face a choppy, sideways market in the coming months before a more decisive trend emerges. For now, key trading pairs like SOL/USDT, which saw a 2.7% gain to $151.86, and ADA/USDT, up 1.6% to $0.5845, continue to show short-term volatility that presents opportunities for nimble traders, even within a broader consolidation pattern.
For traders and advisors, the current market dynamic demands a nuanced approach. The primary narrative to watch is the potential capital rotation from Bitcoin into altcoins. If historical cycles repeat, the current lag in altcoin performance could represent a significant buying opportunity. However, this strategy is not without risk. As highlighted in a recent OECD report, the global economic landscape remains fragile, with persistent policy uncertainty and tighter credit conditions potentially weighing on speculative assets. Therefore, a prudent strategy may involve maintaining a core position in Bitcoin while gradually diversifying into promising Layer-1 and DeFi ecosystems. Monitoring key indicators like the ETH/BTC ratio, DeFi TVL, and institutional flows into altcoin-focused products will be crucial for timing this rotation effectively. Staying objective and focusing on fundamental drivers, such as network activity and developer momentum, will be essential to navigating the next phase of the market cycle.
Michaël van de Poppe
@CryptoMichNLMacro-Economics, Value Based Investing & Trading || Crypto & Bitcoin Enthusiast