Don't want to trade it yourself?
Our desk runs DEX portfolios on profit share.
Bitcoin’s dominance just slipped below 60% for the fourth time in history, and the previous three crossings each ended very differently. One crucial factor sets this moment apart from all of them, and it changes everything about what comes next.
This post may contain links from our sponsors and affiliates, and Flywheel Publishing may receive compensation for actions taken through them.
Bitcoin’s (CRYPTO:BTC) share of the total cryptocurrency market fell below 60% during the week ending September 26, 2026, even as its price rose 3.3%. Bitcoin dominance, a key crypto metric, measures Bitcoin’s market value against the combined value of all cryptocurrencies. This figure slipped below 60% as seven large altcoins outperformed Bitcoin, led by Litecoin (CRYPTO:LTC), which rose 23.7%.
Historically, the dominance ratio has fallen below 60% three times, and each crossing led to different outcomes. This raises the question: which of these past events does this recent drop resemble? The answer lies in a crucial factor that previous crossings lacked: the influx of $2.4 billion into Bitcoin funds during the same week its share decreased.
Bitcoin’s Share Fell While Bitcoin Rose 3%, Because Seven Altcoins Rose Faster
Bitcoin’s dominance measures the ratio of its market value—calculated by multiplying its price by the number of coins in circulation—against the total market value of all cryptocurrencies combined. This metric can fall even when Bitcoin’s price rises, as in the week ending September 26. During that time, Bitcoin’s holders ended up with more money than they started with, because Bitcoin rose, even as other cryptocurrencies posted significant gains.
The altcoins that outperformed Bitcoin during that week included Litecoin, which soared by 23.7%, Cardano (CRYPTO: ADA) at 12.7%, Dogecoin (CRYPTO: DOGE) at 12.0%, Chainlink (CRYPTO: LINK) at 11.9%, Stellar (CRYPTO: XLM) at 11.2%, XRP (CRYPTO: XRP) at 10.4%, and Solana (CRYPTO: SOL) at 9.3%. This diverse mix includes a payments fork, app platforms, a meme coin, an oracle network, and several payment coins, indicating widespread trader interest inhigher-risk investments.
Bitcoin’s dominance metric has limitations—it tracks prices and supply but overlooks who is buying and how much. Moreover, because the total crypto market value used to calculate Bitcoin’s share includes stablecoins—tokens pegged to the dollar—new stablecoin issuance can reduce Bitcoin’s dominance, even if Bitcoin itself remains unchanged in wallets. Thus, a reading below 60% suggests that Bitcoin underperformed relative to other coins for that week.
The Last Three Times Bitcoin Dominance Fell Below 60%, Altcoins Rallied Twice and Fell Once
The first time Bitcoin’s share fell below 60% was in March 2017. At that point, Ethereum and XRP drew substantial investments, causing Bitcoin’s share to continue falling to around 33% by January 2018. This rapid decline occurred alongside a massive altcoin rally, followed by a market collapse later that year.
The second occurrence was in early 2021. Bitcoin’s dominance fell below 60% in March, down from about 70% at the start of the year. It hit a low of nearly 40% in May as Dogecoin and various app platforms surged. However, the altcoins struggled more than Bitcoin during the subsequent crash in May 2021, leading late investors to suffer significant losses.
The third drop happened in September 2025 when the altcoin season index—measuring how many of the top 100 coins outperformed Bitcoin over 90 days—climbed to 78 on September 20. However, this rally quickly diminished, and the index fell to 14 by December 19, allowing Bitcoin’s share to rebound above 60%, where it has mostly stabilized between 58% and 62% for much of the year.
Bitcoin Funds Took In $2.4 Billion the Same Week, Which No Past Crossing Had
What distinguishes this current crossing from the past is the substantial capital influx into Bitcoin at the same time. From September 21 to 25,U.S. spot Bitcoin ETFs, which directly hold Bitcoin, attracted about $2.4 billion in investments during the week when Bitcoin’s dominance slipped below 60%. This influx changes the ratio’s dynamics, showing that rather than money flowing out of Bitcoin, it was a period of active investment.
While daily fund inflows decreased throughout the week, indicating a slight loss of buying urgency,significant capital continued to flow ineach day.
One week of data isn’t enough to signal a lasting trend, which requires sustained capital shifts from one coin to another. Any gains from altcoins could easily reverse the following week, as happened after the September 2025 crossing.
Is Bitcoin’s Drop Below 60% the Start of an Altcoin Season?
At this stage, we believe it is too early to declare the start of an altcoin season. The September 2025 crossing closely mirrors the current situation. Bitcoin rose 3.3%, and $2.4 billion in funds entered Bitcoin during the week its dominance fell, suggesting capital isn’t fleeing Bitcoin. Instead, broad-based gains in altcoins suggest no single sector is leading the charge.
However, overlooking potential early signs of a 2017 or 2021-like rally could be a mistake. One key indicator will determine the trend: if daily inflows into Bitcoin ETFs shift to outflows while altcoins continue to rise through October, it could signal a pattern similar to 2021.
Contact [email protected] for any questions or corrections.
Sam Daodu is a crypto analyst who’s spent nearly a decade making blockchain understandable—no easy task when most whitepapers read like fever dreams. He writes for 24/7 Wall St., covering Bitcoin, altcoins, and crypto market analysis for investors. Before crypto, he was a tech writer (back when explaining “the cloud” was peak innovation). Since 2018, he’s written for CoinTelegraph, Yahoo Finance, The Block, Cryptonews, Zypto, Rain, and more—basically anywhere people want crypto news without the headache. Sam runs MacLabs Marketing, a content agency for crypto brands tired of sounding like AI wrote their website. He also publishes free crypto education on his site for Web3 enthusiasts who think “gas fees” is a typo. When he’s not writing or staring at charts, Sam’s either: – Watching anime (currently convinced One Piece has better tokenomics than most altcoins) – At the gym sculpting himself into a Greek god – Listening to the music your mum warned you only bad boys listen to Connect: LinkedIn | Email | MacLabs Marketing
Source: 247wallst.com