Around September 22, 2026, the net inflow of Bitcoin spot ETFs broke $1 billion in a single day, marking the largest single-day net inflow since October 2025. Among this, IBIT saw a single-day inflow of approximately $381 million, while ARKB and FBTC each exceeded $200 million. All six major spot ETFs recorded net inflows that day, indicating a significant increase in traditional capital's risk appetite for Bitcoin through compliant products. At the same time, Glassnode data shows that the seven-day rolling average of altcoin cycle signals rose to 81.25, with Bitcoin's market cap share falling below 60%. Bitcoin still stands at a central position in terms of funds, but the structural trading willingness around the top 250 non-Bitcoin assets is strengthening, laying the groundwork for the classic rotation path of "Bitcoin leading, altcoins following." Against this backdrop, Ethereum has become the primary candidate asset for capital attention: the current price is approximately $2794. Peter Brandt views $5000 as a critical long-term resistance level; if surpassed, he looks toward approximately $8600. On the other hand, Binance announced a $100 million investment in Circle and expanded its cooperation around USDC. After the announcement, Circle's pre-market stock price turned from a decline to an increase, reinforcing expectations for the link between the Ethereum ecosystem and dollar-denominated asset pathways. With PlanB stating that Bitcoin has surpassed all major realized price indicators, and this cycle is expected to reach new highs, the key observation points for the market are shifting from "how much more can Bitcoin rise" to "which sectors will accommodate the next allocation of ETF incremental funds."
ETF Net Inflow Exceeds 1 Billion: Wall Street Reinvests in Bitcoin
According to single-source statistics, the net inflow of Bitcoin spot ETFs broke $1 billion in a single day recently, marking the largest single-day net inflow since October 2025. This figure itself is not just a price story but a signal of changes in the capital structure. In terms of composition, IBIT had a net inflow of about $381 million that day, contributing more than one-third of the total increase, making it the fourth highest single-day inflow record in its history; ARKB and FBTC each surpassed $200 million in net inflow, together occupying nearly half of the total inflow. The remaining products collectively achieved net purchases of several hundred million dollars. All six Bitcoin spot ETFs recorded net inflows that day, and the relevant data mainly reflects trading from the previous Friday, indicating the potential for further upward revisions. This shows that funds are not concentrating solely on one leading product but are simultaneously increasing exposure to Bitcoin through multiple channels.
The simultaneous net inflow of all six products indicates that the client instructions from various custodial banks, market makers, and sales channels on Wall Street exhibited a directional configuration on the same trading day, which is a clear contrast to the earlier attempts of "only buying one or two star ETFs." The attitude of traditional capital is shifting from tentative product speculation to systematically increasing Bitcoin positions across the entire ETF basket. Concurrently, PlanB expressed that Bitcoin has surpassed all major realized price indicators, which are usually regarded as the average cost range for long-term holders in this cycle based on on-chain transaction costs and holding history. When the BTC price runs above these realized prices, alongside the largest single-day net inflow to ETFs since last October, the two create a resonance: the on-chain cost structure offers a backdrop for "cycle upward still ongoing," while Wall Street capital confirms this on-chain reading with real funds via ETFs. This also provides a more binding observation framework for whether assets outside Bitcoin can attract additional funds.
Altcoin Cycle Signals Surge: Bitcoin's Market Share Drops Below 60%
As Bitcoin gets confirmation of incremental funding through spot ETFs, another crucial reading from a structural perspective comes from Glassnode's altcoin cycle signal. According to single-source data, this indicator measures the market performance of the top 250 non-USDC tokens relative to Bitcoin, showing a seven-day rolling average of 81.25, which has significantly increased this week. Simply put, this increase does not measure absolute gains but depicts the "relative strength between non-Bitcoin assets and Bitcoin." A rising reading indicates that the overall performance of the top 250 tokens is strengthening relative to Bitcoin in the recent phase.
In sync, Bitcoin's market cap share has fallen below 60%, creating a relatively consistent picture with these two signals: market attention is starting to spread from solely Bitcoin to more non-Bitcoin assets. However, the current material does not provide historical percentile ranges for this cycle signal and specific threshold settings, making it impossible to precisely determine whether 81.25 is in a strong, extreme, or neutral range. Moreover, the reporting timing is September 22, 2026, essentially reflecting recent structural changes rather than fixed long-term conclusions. Therefore, this round of altcoin cycle signals and the drop in Bitcoin's market share are better viewed as a dimension for observing capital preferences, rather than simply summarizing it as a "confirmed altcoin season" trading slogan.
Ethereum Stuck at 2800: Focus on 5000 and 8600
With the net inflow of Bitcoin spot ETFs exceeding $1 billion and altcoin cycle signals rising, technical analysts are increasingly focusing their attention on Ethereum. Trader and chart analyst Peter Brandt, who warned of a Bitcoin crash back in 2018, recently provided a clear price framework: he believes Ethereum's critical long-term resistance is at $5000. If effectively broken, this trend structure could extend to around $8600. At the time of reporting, Ethereum's price was around $2794, still showing considerable distance from $5000, suggesting that the current range technically resembles a "momentum buildup" area rather than the final phase approaching the target.
From a risk-reward perspective, if the $2794 level is used as a reference, the theoretical space to move up to $5000 is much larger than the downward retracement value that has been validated. This is the logical basis for trend traders like Brandt to confidently project an $8600 extension target. However, this technical picture must be understood in the context of the current rotation narrative: on one side, traditional funds increase exposure through Bitcoin ETFs, supported by viewpoints such as PlanB emphasizing Bitcoin's potential for new highs, and on the other side, Glassnode's altcoin cycle signal rises, with Bitcoin's market share falling below 60%, creating an emotional and structural environment for mainstream non-Bitcoin assets like Ethereum to "take the baton." The real realization still depends on whether the price can cross the $5000 technical boundary in the capital rotation.
Binance Bets $100 Million on Circle: USDC Cooperation Upgrade Signal
During the same window period of rising funds in Bitcoin ETFs and increasing expectations for the rotation of altcoins and Ethereum, Binance announced a $100 million investment in Circle and signaled that the two sides would further upgrade cooperation around USDC. According to publicly available information, USDC has already become one of the mainstream dollar-denominated on-chain settlement tools, playing the role of facilitating funds between exchanges and on-chain applications. This investment seems to strengthen the binding relationship between this "dollar infrastructure" operator and the largest trading platform. In the medium term, this binding may drive trading platforms to open more trading pairs, deposit, withdrawal, and settlement scenarios for USDC, and it cannot be ruled out that the usage proportion of USDC may be further increased in on-chain payments, protocol collateral, and yield distribution. However, the specific pace and scope still remain uncertain.
It is noteworthy that after the announcement, Circle's pre-market stock price turned from falling to rising, reflecting traditional stock market pricing logic regarding such collaborations: investors are not only concerned about the single $100 million funding itself but also about whether USDC, as a dollar-denominated settlement channel, will have its strategic position solidified among ETF products, trading platforms, and on-chain applications. In other words, as the net inflow of Bitcoin ETFs breaks $1 billion and altcoin signals rise, this bet from Binance is viewed by the traditional market as a clear statement on "how the dollar is repositioned within the crypto ecosystem," with the stock price response being a direct manifestation of the reassessment of USDC's infrastructure value.
PlanB and Bulls Take Profits: Expectations for This Bitcoin Cycle
Overall, the signals from this round indicate: on one hand, the net inflow of Bitcoin spot ETFs broke $1 billion with all six products showing net inflows, providing a backdrop for the return of traditional funds; on the other hand, the Glassnode altcoin cycle signal has risen and Bitcoin's market cap share has dropped below 60%, combined with technical analysts viewing $5000 as a key resistance for Ethereum while it is around $2794, and Binance's $100 million investment to strengthen USDC cooperation, these threads of capital and structural, technical and infrastructure narratives are being pieced together by the market into a unified "rotation and expansion" cycle scenario. Within this framework, PlanB highlights that Bitcoin has surpassed all major realized price indicators and predicts that this cycle is likely to reach new highs, becoming a typical cycle interpretation of the aforementioned data; the profits realized at the on-chain and trading ends provide a tangible sample of sentiment—some Bitcoin long positions have floating profits of about $12.26 million with a yield of about 26.19%, and the largest position of 1000 BTC on Hyperliquid realized profits of about $8.52 million, indicating that the bulls currently have a certain degree of profit thickness. Whether this supports PlanB's expectation of a new cycle high depends on several key variables: whether ETF net inflows can be sustained rather than being a fleeting event, whether the structural changes in altcoin signals and Bitcoin's market share persist, whether ETH can approach and break the $5000 technical level, and whether dollar-denominated infrastructures such as USDC can realize and expand their actual use both on-chain and off-chain.
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