U.S. Bitcoin ETF attracts $457 million in a single day, Bitcoin market share returns to the 60% threshold

Amid the sharp fluctuations in Bitcoin prices, the US spot Bitcoin ETF has experienced the strongest capital inflows in over a month. According to data, on Wednesday (December 18), this category of products recorded a net inflow of up to $457.3 million, the highest single-day record since November 11. Among them, Fidelity’s FBTC led with $391.5 million in inflows, making it one of the top five largest inflow days in the product’s history, highlighting institutional investors’ “safe-haven” preference for Bitcoin amid macro uncertainties.

Meanwhile, Bitcoin’s market dominance (i.e., Bitcoin’s market cap as a proportion of the total cryptocurrency market cap) rose to 60%, reaching a one-month high, further confirming that funds are shifting from altcoins to Bitcoin. Market analysis indicates that in the low liquidity environment during the holiday season, this “shift to quality assets” trend may signal broader changes in market structure.

Capital Flood: ETF Single-Day Inflows Hit Monthly High, Fidelity FBTC Becomes Biggest Winner

On Wednesday, the US spot Bitcoin ETF market shook off recent gloom and saw a surge of buying. According to Farside Investors, the sector recorded a total net inflow of $457.3 million, marking not only continuous capital inflows but also the strongest single-day performance since November 11. The concentrated influx of funds was not evenly distributed but showed a clear “head effect.”

Leading the pack was Fidelity’s Wise Origin Bitcoin Fund (FBTC), with a single-day net inflow of $391.5 million. This made that day one of FBTC’s top five largest inflow days since launch, demonstrating the strong appeal of products under large traditional financial institutions to mature capital. Close behind was asset management giant BlackRock’s iShares Bitcoin Trust (IBIT), which also received $111.2 million in net inflows. The strong performance of these two giants together formed the main force behind the day’s capital inflows.

This capital movement occurred against the backdrop of Bitcoin experiencing a “rollercoaster” price action. On that day, Bitcoin surged close to $90,000, then quickly retreated below $86,000. This price volatility did not scare off investors; instead, it may have prompted some capital seeking to buy the dip or hedge risks to accelerate entry through regulated ETF channels. Industry analysts interpret this as the market viewing Bitcoin ETFs as a new asset class with low correlation to traditional markets and long-term growth potential, especially during the year-end portfolio rebalancing window.

Key Inflow Data Overview

Single-day net inflow: $457 million (highest since November 11)

Fidelity FBTC inflow: $391.5 million (top five inflow days)

BlackRock IBIT inflow: $111.2 million

Bitcoin dominance: 60% (highest in a month)

The Return of the King: Bitcoin Dominance Breaks 60%, Market Landscape Brewing Major Changes

In tandem with ETF capital inflows, Bitcoin’s dominance in the entire crypto market has significantly increased. The Bitcoin dominance index rose to 60%, reaching its highest point since November 14 (when Bitcoin was close to $100,000). This change is no coincidence; it reveals the core logic of current market fund flows.

An increase in Bitcoin dominance is often interpreted as a sign of declining risk appetite or entering “safe-haven mode.” When macro uncertainties increase or the overall market direction is unclear, funds tend to flow out of more volatile, weaker fundamentals mid-cap and small-cap altcoins, re-concentrating into the largest, most liquid, and most consensus-driven Bitcoin. Shivam Thakral, CEO of Indian cryptocurrency exchange BuyUCoin, commented: “The $457 million inflow into Bitcoin clearly indicates a ‘shift to quality assets’ trend. In macro uncertainties, investors prioritize liquidity, regulatory clarity, and demand driven by Bitcoin ETFs.”

Currently, Bitcoin trades in a range of $87,000 to $88,700, with a slight 1.5% increase over 24 hours. Although still below its all-time high, its price resilience is noteworthy. Thakral added: “Despite uneven broader market capital flows, Bitcoin has held key support levels and demonstrated strong absorption of selling pressure, consistent with the $457 million inflow. This resilience suggests investors are positioning for medium-term upside while remaining cautious on higher-risk assets.”

Contrasts and Divergences: Ethereum ETF Continues to Bleed, Capital Preferences Show Clear Segmentation

Contrasting sharply with the hot Bitcoin ETF is the lackluster performance of other crypto asset ETFs, especially Ethereum. Data shows that on the same day, the US spot Ethereum ETF experienced a net outflow of $22.43 million, marking the fifth consecutive day of capital outflows for this product. This divergence clearly maps current institutional and mature investor preferences.

This preference is even reflected in predictive markets. Users of prediction platform Myriad believe there is a 63% chance Bitcoin will rise to $100,000, and a lower probability of falling to $69,000. Conversely, for Ethereum, users assign only a 32% chance of reaching $4,000, with a higher likelihood of dropping to $2,500. This market sentiment directly influences capital allocation decisions.

Thakral analyzed: “The continued capital outflow from Ethereum reflects cautiousness about its recent catalysts, while the subdued performance of other altcoins like XRP indicates that capital is making selective allocations rather than broad risk-taking. Capital is not leaving the crypto market; it is reallocating around assets perceived as safest and most accessible to institutions.” This points to a key conclusion: the current wave of institutionalization initiated by spot ETFs is still highly concentrated in Bitcoin, with limited spillover into other tokens. The market is experiencing a specific phase of “Bitcoin dominance.”

Hidden Currents: Opportunities and Risks in a Low Liquidity Environment

Despite positive capital signals, investors should remain sober about the current market environment. The year-end holiday season is already here, typically meaning lower trading volumes and tighter market liquidity. In this “low volume, low liquidity” setting, any large unexpected buy or sell orders are more likely to trigger sharp price swings or even cascade liquidations, causing short-term “long and short kills.”

Meanwhile, a series of macroeconomic events are about to unfold, adding extra volatility. The Bank of England (BOE) is expected to cut interest rates by 25 basis points tonight Beijing time, while the European Central Bank (ECB) may hold rates steady. Additionally, the US and Japan will release their latest inflation data. The outcomes of these events will influence global capital pricing of risk assets, and the crypto market will not be immune.

A noteworthy indicator is Bitcoin’s implied volatility. According to the Volmex Bitcoin Implied Volatility Index (BVIV), this indicator is currently just below 50. Historically, this level is low, suggesting that despite recent increased market volatility, the options market has not fully priced in large future swings. This “expectation gap” means that if macro surprises or market events occur unexpectedly, Bitcoin prices could move far beyond the implied volatility embedded in current options prices. For investors, managing leverage and preparing for potential high volatility are key to navigating this market phase.