Bitcoin's Share of Crypto Market Drops Below 60%: What Happens Next?

KUALA LUMPUR, 27 SEPTEMBER 2026 —

Bitcoin’s share of the total cryptocurrency market slipped below the 60 percent threshold for the first time since September 2025, even as the digital‑currency flagship posted a 3.3 percent price gain in the week to 26 September 2026, data from crypto‑market trackers showed.

Bitcoin’s dominance metric fell below 60 percent as the market‑wide rally unfolded. While Bitcoin’s price rose, the market capitalisation of other tokens expanded at a faster pace, pulling the share down. The seven altcoins that outperformed Bitcoin during the week were Litecoin (up 23.7 percent), Cardano (12.7 percent), Dogecoin (12.0 percent), Chainlink (11.9 percent), Stellar (11.2 percent), XRP (10.4 percent) and Solana (9.3 percent).

The mix spans payment‑focused coins, smart‑contract platforms, a meme token and an oracle network, indicating that investor interest was spread across diverse segments rather than concentrated in a single niche.

The influx of capital into Bitcoin‑linked products adds a further layer to the picture. From 21 to 25 September, U.S. Spot Bitcoin ETFs – funds that hold the cryptocurrency directly – attracted roughly US$2.4 billion in new investments. The same week that Bitcoin’s dominance slipped, the funds recorded daily inflows that, while tapering toward the end of the period, remained positive each day.

This contrasts with the three earlier instances when Bitcoin’s share fell below 60 percent, none of which featured a comparable injection of fresh money into Bitcoin‑focused vehicles.

Historical precedent offers mixed signals. The first time Bitcoin’s dominance dropped below the 60 percent mark was in March 2017, when Ethereum and XRP drew substantial inflows and Bitcoin’s share continued to slide to about 33 percent by January 2018. That period culminated in a massive altcoin rally that later gave way to a market crash later in 2018.

The second crossing occurred in early 2021; dominance fell below 60 percent in March after starting the year near 70 percent, reaching a low of almost 40 percent in May as Dogecoin and various application‑layer tokens surged. However, when the broader market corrected in May 2021, altcoins underperformed Bitcoin, leaving many late‑stage investors with losses.

The most recent dip before the current one happened in September 2025, when the “altcoin season index” – a gauge of how many of the top 100 coins outperformed Bitcoin over a 90‑day window – rose to 78 on 20 September before collapsing to 14 by 19 December, allowing Bitcoin’s dominance to rebound above 60 percent and stabilise between 58 percent and 62 percent for most of the year.

What sets the September 2026 episode apart, according to the data, is the concurrent capital inflow into Bitcoin ETFs. While the earlier drops were characterised by either stagnant or outflowing funds, the current week saw investors pour US$2.4 billion into products that hold Bitcoin directly. This suggests that, rather than money fleeing Bitcoin, investors were simultaneously adding to Bitcoin positions even as altcoins posted broader gains.

The dominance metric, however, has inherent limitations. It reflects price movements and circulating supply but does not capture the identity of buyers or the volume of transactions. The total market‑cap denominator includes stablecoins – tokens pegged to fiat currencies – whose issuance can dilute Bitcoin’s share without any change in Bitcoin’s own holdings.

Consequently, a reading below 60 percent indicates that Bitcoin underperformed relative to the rest of the market for that week, but it does not alone confirm a shift in investor sentiment.

Market observers caution that a single week of data is insufficient to confirm a sustained trend. In September 2025, a similar dip in dominance was followed by a rapid reversal as the altcoin season index fell sharply, allowing Bitcoin’s share to climb back above the 60 percent line. The current scenario could evolve in either direction.

If daily inflows into Bitcoin ETFs turn into outflows while altcoins continue to rise through October, the pattern would echo the 2021 episode, potentially heralding a more prolonged altcoin season. Conversely, continued inflows into Bitcoin funds could sustain the cryptocurrency’s market‑value share despite the broader rally.

For regional investors, the development carries implications for portfolio allocation. Malaysia’s crypto‑friendly regulatory stance has encouraged local exchanges to list both Bitcoin and a range of altcoins, and the recent performance differentials may prompt traders to rebalance exposure toward higher‑risk tokens that have shown strong week‑over‑week gains.

At the same time, the sizeable US$2.4 billion inflow into Bitcoin ETFs underscores persistent institutional confidence in Bitcoin as a store of value, a factor that could temper excessive shifts toward altcoins.

The next data points to watch will be the direction of daily net flows into Bitcoin‑linked ETFs and the performance trajectory of the seven leading altcoins. Should ETF inflows reverse to net outflows while the altcoins maintain or accelerate their gains, analysts may interpret the market as entering a phase akin to the 2021 altcoin surge.

If, however, Bitcoin‑ETF inflows remain, the dominance dip may prove temporary, reflecting a momentary diversification rather than a structural reallocation of capital.

The market will therefore be closely monitoring fund flow reports and dominance readings in the coming weeks to determine whether the September 2026 dip marks the start of a new altcoin season or simply a brief episode of broader market enthusiasm.