Bitcoin Logs Best Q3 Since 2017 as Ethereum Posts Record Quarter

Data from CoinGlass shows that Bitcoin achieved its strongest third quarter in nine years, posting a 42.71% increase across the three-month period. Meanwhile, Ethereum surpassed that performance by delivering the best Q3 in its history, surging 70.8% between July 1 and September 30. This rebound follows a sluggish start to the year accompanied by two successive quarters of losses.

The wider altcoin ecosystem also enjoyed a robust quarter. Tracking data via the TOTAL3ES chart—which measures the overall crypto valuation excluding Bitcoin, Ethereum, and stablecoins—reveals an influx of roughly $183 billion. This represented an approximate 50% expansion, climbing from about $364 billion to end the period near $547 billion.

Standout altcoins during Q3 included Zcash, which rallied over 260%, and Uniswap, which climbed more than 200%. Chainlink nearly doubled in value, and Hyperliquid achieved fresh highs. Solana experienced its most robust three-month stretch following a punishing sequence of ten consecutive red months, while Quant delivered a notable surge primarily during the final days of the quarter.

ETF Money Returned After a Brutal June 

Institutional capital returned to the market in force throughout the quarter. According to SoSoValue, spot Bitcoin ETFs attracted $6.49 billion during Q3, bolstered by $3.52 billion in August alone, recovering from a $4.51 billion withdrawal in June. Q3 interrupted a multi-quarter downturn, marking the initial positive period after three straight quarters of net outflows. Collective net assets across these vehicles expanded from $70.95 billion to nearly $108 billion.

Spot Ethereum ETFs experienced a comparable trend, registering $3.11 billion in net inflows over the three months to mark their third-highest quarterly figure on record. Their combined net assets more than doubled, finishing at $17.79 billion.

Corporate balance sheet acquisitions also resumed, with Strategy restarting its Bitcoin accumulation during the period.

Treasury Buybacks and the SEC Helped Lift Sentiment

In August, the US Treasury broadened its purchases of long-dated bonds, helping to alleviate pressure on yields. Furthermore, the SEC introduced an “Innovation Exemption” for tokenized equities, providing an additional boost to market sentiment despite the ongoing stagnation of the CLARITY Act in Congress.

Traders now turn to the Oct. 27-28 Fed meeting

Following a softer-than-anticipated Personal Consumption Expenditures (PCE) report on September 30, market participants scaled back expectations for an October interest rate hike. However, that sense of relief may prove temporary, as the Federal Reserve’s upcoming gathering on October 27-28 is expected to set the macroeconomic tone for the remainder of the quarter. Persistent inflation or a robust employment report would sustain elevated Treasury yields and a strong US dollar, conditions that have historically presented challenging headwinds for digital assets.

The sustainability of exchange-traded fund inflows remains another open question. Spot Bitcoin ETFs secured $2.80 billion in September, representing a decline from the August figure. Ether-backed products experienced a steeper slowdown, collecting $892 million last month compared to $1.85 billion in the preceding month.

Bitcoin’s $80,000 support is the line to watch

From a technical perspective, $80,000 serves as the critical support level Bitcoin must defend as it enters Q4. Maintaining this threshold keeps upside objectives at $87,400 and subsequent resistance at $90,000 accessible. Conversely, a breakdown beneath this mark would return market control to sellers following a quarter where bearish momentum was notably scarce.

Historical seasonality tends to favor Bitcoin on paper; its median fourth-quarter performance since 2013 stands at 26.59%, the highest among all quarters recorded on CoinGlass. Conversely, Ethereum exhibits a much tamer Q4 history, averaging a median return of only 0.15%.

Regulatory clarity remains unresolved. With the CLARITY Act remaining stalled, any legislative developments regarding US cryptocurrency policy in the weeks ahead could determine how much of this quarter’s institutional interest persists toward year-end.

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