Key Takeaways
- Altcoin spot trading volume now runs at nearly four times Bitcoin’s, its highest relative level since September 2025, according to Glassnode.
- Glassnode says similar bursts of risk appetite have often appeared near local Bitcoin tops, though the ratio alone cannot predict a reversal.
- Bitcoin pulled back toward $84,000 after reaching roughly $87,000 last week, even as ETF inflows supported its weekly gain.
Altcoin spot trading volume has climbed to nearly four times Bitcoin’s, its highest relative level since September 2025, according to Glassnode.
The shift shows traders embracing riskier crypto assets just as Bitcoin struggles to hold the gains from last week’s rally.
Glassnode warned that strong demand for altcoins has often coincided with local peaks in Bitcoin’s price.
The pattern raises a question for traders: does the rotation signal a healthy expansion of the rally, or has enthusiasm begun to outpace Bitcoin’s momentum?
Altcoins Take a Larger Share of Trading
The volume ratio measures trading activity in altcoins relative to Bitcoin, rather than a fourfold rise in altcoin prices. It suggests traders are directing more spot activity toward assets outside BTC, where price swings can be larger, and gains during a rally can come faster.
The rotation had already begun before the latest reading. Glassnode found that 72.5% of the altcoins it tracked had outperformed Bitcoin over the previous week.
During August’s Bitcoin-led rally, that share peaked at 39%. Spot trading volume across exchanges had also risen 121% from its August low, although its seven-day average remained about 30% below the level recorded a year earlier.
There is a useful distinction between this rally and some past speculative surges. Glassnode said altcoin perpetual futures open interest had barely grown over 30 days, with fewer than half of the markets it tracked adding positions.
Spot buying, rather than a broad buildup of leveraged bets, appeared to drive much of the move. That could reduce the risk of a sudden wave of forced liquidations, though it does not protect prices from a sell-off.
Bitcoin Slips Back Toward the Bottom of Its Range
Bitcoin traded near $84,000 on Monday, Sept. 28, after reaching roughly $87,000 the previous Wednesday. It finished the week about 4% higher, but Glassnode said last Monday’s jump accounted for that gain.
The subsequent pullback brought BTC back toward the lower end of its recent range.
Different groups of traders took opposite sides of that move. US spot Bitcoin ETF buyers delivered the strongest weekly net inflow in almost a year, according to Glassnode.
At the same time, perpetual futures traders shifted toward heavy net selling, and Monday’s decline triggered long liquidations.
Futures and options open interest remained elevated, which means traders still held sizable positions even as the market’s bullish tilt weakened.
Glassnode also reported fresh capital entering Bitcoin: its measures of realized capitalization growth and short-term capital activity both stood above their usual ranges.
Does the Volume Spike Signal a BTC Top?
Glassnode’s warning concerns a local top: a near-term high followed by a pullback. The altcoin-to-Bitcoin volume ratio does not, by itself, establish that Bitcoin has reached one.
Traders can rotate into altcoins while BTC consolidates and then return to Bitcoin if demand holds.
Profit-taking gives the warning more weight. Glassnode said nearly three-quarters of Bitcoin’s supply sat in profit, while recent holders’ unrealized gains and realized profit-taking ran above their usual ranges.
Those conditions give holders an incentive to sell into strength. ETF inflows and new capital have so far helped absorb that pressure.
For now, the market shows both sides of the trade: broader spot participation supports the crypto rally, while Bitcoin’s pullback, derivatives selling and elevated profits test its staying power.
A further rise in altcoin leverage or heavier Bitcoin profit-taking would strengthen the case that speculative demand has become stretched.
The information provided in this article is for informational purposes only. It is not intended to be, nor should it be construed as, financial advice. We do not make any warranties regarding the completeness, reliability, or accuracy of this information. All investments involve risk, and past performance does not guarantee future results. We recommend consulting a financial advisor before making any investment decisions.
Giuseppe Ciccomascolo began his career as an investigative journalist in Italy, where he contributed to both local and national newspapers, focusing on various financial sectors.
Upon relocating to London, he worked as an analyst for Fitch's CapitalStructure and later as a Senior Reporter for Alliance News. In 2017, Giuseppe transitioned to covering cryptocurrency-related news, producing documentaries and articles on Bitcoin and other emerging digital currencies. He also played a pivotal role in establishing the academy for a cryptocurrency exchange website. Crypto remained his primary area of interest throughout his tenure as a writer for ThirdFloor.
