On June 6, 2026, the crypto market saw a highly symbolic, momentary event. According to Gate market data, on that day the market cap of USDT issued by Tether was about $18.737 billion, while Ethereum (ETH), after its price fell to around $1,530, had a temporarily reported market cap of about $18.3 billion—briefly below USDT. This meant that for the first time, USDT surpassed ETH on a market-cap basis, rising to second place on the crypto asset market-cap ranking, behind only Bitcoin.
This situation did not last. By June 8, 2026, the ETH price rebounded to above $1,670, and its market cap returned to about $20.15 billion, reclaiming the second position. However, the structural trend revealed by this short-term “swap” is far more worth attention than the persistence of the ranking itself.
Was USDT’s short-term surpassing of ETH an accidental fluctuation or a structural signal?
To judge the nature of this event, you need to look at the long-term trajectory of two variables at the same time.
From the perspective of USDT, its market-cap growth is a steadily upward curve. USDT’s market cap grew from about $4 billion in early 2020 to its current $18.737 billion—more than 45 times. This growth is not a one-off occurrence; it is a structural expansion driven jointly by net issuance and global demand for dollar liquidity.
From the perspective of ETH, although its market cap still stays around the $200 billion scale, its relative position has already fallen significantly. Ethereum’s share of total crypto market cap (market share) dropped from its 2021 peak of 21.7% to roughly 9.3% today. At the same time, ETH’s price has been under persistent pressure over the past year, with the trading center of gravity gradually moving downward.
When USDT’s steady upward curve intersected ETH’s relative weakness curve on June 6, 2026, even if that intersection lasted only a short time, it sent a clear signal to the market: stablecoins have grown into a force that can stand on the same day-to-day playing field in market-cap terms as major volatility crypto assets.
What drives USDT’s market cap to keep expanding to $18.737 billion?
USDT’s market-cap growth is mainly driven by two layers: net issuance of circulating supply, and the yield model of reserve assets.
On the supply side, as of June 8, 2026, USDT’s market cap was about $18.737 billion, up by a net increase of a few tens of billions of dollars compared with the start of the year. Meanwhile, the total market cap of stablecoins surpassed $320 billion in the same period, growing about 12% from the start of the year. This growth occurred against the backdrop of overall pressure on the total crypto market cap, showing the independence of stablecoin demand.
On the reserve side, Tether’s disclosed Q1 2026 report shows the company holds about $141 billion in U.S. Treasury bills, making it the 17th largest holder of U.S. Treasuries in the world. For every USDT issued, there is a corresponding inflow of U.S. dollar cash flows that are allocated into U.S. short-term Treasuries. This “issue—allocate—earnings” closed-loop model reduces the marginal cost of USDT supply and provides financial sustainability for continued issuance.
In addition, the progress of regulatory frameworks such as the U.S. GENIUS Act further clarifies the compliance path for stablecoins. The bill requires issuers to maintain 1:1 reserves using high-liquidity assets (primarily U.S. Treasuries). In practice, this upgrades USDT’s existing reserve strategy from a commercial choice to a制度 standard.
Why did Ethereum shift from leading in market cap to relative weakness?
ETH’s role in this event is not just that of the “surpassed.” Its declining relative position reflects multiple structural pressures.
In terms of price performance, after ETH hit a low point in February 2026 and rebounded, it still traded overall in a range of $1,500 to $2,400, repeatedly failing to break through prior highs. The sharp selloff in early June pushed the price down to around $1,530, setting a new interim low. Although it later rebounded to above $1,670, this price level is still meaningfully lower than a year ago’s high.
From on-chain data, ETH exchange inflows rose to a four-month high on June 6, indicating that selling pressure was concentrated and released. Ethereum’s total value locked (TVL) has continued to decline, suggesting weaker activity in the on-chain ecosystem and reduced capacity for capital to remain on-chain. In the derivatives market, the funding rate is at a historical low, reflecting a large-scale liquidation of leveraged long positions.
More fundamentally, ETH’s market share fell from 21.7% in 2021 to the current 9.3%. This decline means that as the crypto market as a whole grew, ETH did not keep up with the expansion pace of other assets such as Bitcoin and stablecoins. Diminishing marginal effects of technical narratives, the redirecting effect of competitive L1/L2 chains, and rising market preference for “yield-bearing assets” together form the structural backdrop for ETH’s relative weakness.
This is not the first time USDT entered the top three by market cap: what’s different from the 2020 surpassing of XRP?
It’s worth looking back: USDT entering the top three by market cap is not new. Back in 2020, USDT surpassed XRP and ranked third by crypto asset market cap. However, the situation then was fundamentally different from today.
When USDT surpassed XRP in 2020, Ethereum’s market cap was about 2.5 times that of USDT. In other words, although USDT entered the top three, there was an order-of-magnitude gap between it and the second-ranked ETH. At that time, the market structure was clearly tiered: Bitcoin first, Ethereum second, USDT third.
The reason the June 6, 2026 event was more shocking is that USDT’s market cap had already grown to nearly match ETH’s level—at one point the gap shrank to about $4 billion, less than 2.5% of ETH’s market cap. When the gap compressed from “multiples” to “percentage points,” a swap in ranking that was theoretically possible became real.
This change in magnitude implies that stablecoins are no longer merely a supportive tool for the crypto market; they now have the capacity to match major volatility assets on the dimension of liquidity scale. Next time, if ETH prices face renewed pressure while USDT continues expanding, a short-term surpassing could evolve into a more enduring ranking shift.
Why say stablecoins have become the on-chain extension of U.S. Treasuries?
To understand the underlying logic behind USDT’s sustained market-cap expansion, you have to step out of the crypto market itself and view it from the macro perspective of global U.S. dollar liquidity.
Dollar-pegged stablecoins currently account for about 98% of all stablecoin market cap, giving them an overwhelming advantage. And the reserve assets of these stablecoins are highly concentrated in U.S. short-term Treasuries. Tether holds about $141 billion in Treasuries, making it the 17th largest holder globally—ranking above sovereign states such as Germany and Saudi Arabia.
This allocation structure creates two effects. On the macro level, increased issuance of stablecoins provides ongoing structural demand for the U.S. short-term Treasury market—essentially building a new Treasury allocation channel driven by crypto users, outside traditional bond markets. In a February 2026 report, the U.S. Department of the Treasury pointed out that demand from stablecoin issuers has maintained an annualized growth rate of about 35% since 2022.
On the micro level, stablecoin users indirectly obtain liquidity yield from U.S. short-term Treasuries by holding USDT (although users do not directly receive interest, the issuer’s earnings support its continued operations and ability to issue more). Functionally, this makes USDT similar to “tradeable digital shares of U.S. Treasuries”—each USDT is an on-chain mapping of U.S. dollar credit and short-term Treasury yields.
This role reshaping upgrades stablecoins from “trading intermediaries” to “on-chain infrastructure for global dollar liquidity.” The ongoing inflation of USDT market cap, in essence, is measuring the scale and penetration of that infrastructure.
What kind of capital flows and risk preferences does the change in crypto market caps reflect?
The phenomenon of USDT briefly surpassing ETH is often interpreted as “heightened market risk-off sentiment causing capital to flow from risk assets to stablecoins.” That interpretation is partly correct, but it requires a more careful breakdown.
In terms of the absolute value of capital flows, during the same period the total crypto market cap evaporated by several hundred billions of dollars, while stablecoin total market cap net increased by about 12% (year-to-date). This means not all capital exiting volatility assets became stablecoins—an equally large portion chose to leave the market entirely. Among the capital that stays, some indeed holds stablecoins, waiting for the next allocation window.
In terms of risk preference structure, the ETH/BTC exchange rate has been weakening, and Bitcoin’s market-cap share has been hovering around the 60% level, indicating that risk capital is not clearly flowing into other small- and mid-cap volatility tokens. The market is showing a “polarized” pattern: one side is Bitcoin favored for risk-off as “digital gold,” and the other side is stablecoins favored for liquidity reserve needs as “digital dollars,” while ETH and other public-chain tokens in between bear the greatest valuation pressure.
Under this capital-flow pattern, stablecoin market-cap expansion and ETH market-cap relative contraction are two sides of the same coin. Together, they depict the current contraction of crypto risk appetite and liquidity concentrating at the infrastructure end.
What are the long-term implications of this event for crypto asset valuation logic?
From a long-term perspective, the intersection between USDT and ETH in market-cap terms (even if it’s only a short-term intersection) signals that the crypto market’s value-evaluation system is undergoing a silent paradigm shift.
Traditionally, crypto asset market-cap rankings play out mostly among different types of volatility assets: Bitcoin, Ethereum, XRP, BNB, Solana, and others. The competition is based on technical narratives, ecosystem scale, speculative expectations, and community consensus. Because stablecoins have a fixed price, they have long been treated as a “background board” rather than a competitor.
But the market-cap intersection between USDT and ETH breaks that framework. It reveals a fact: in the dimension of liquidity scale, stablecoins can now stand alongside the largest volatility public-chain assets. This raises a question the whole industry should consider: in crypto, what exactly should be used to measure “value”—the potential for price discovery, or the scale of liquidity provision?
Looking ahead, as regulatory frameworks such as the GENIUS Act are fully rolled out, and more traditional financial institutions enter the stablecoin issuance space, the total stablecoin market cap is expected to grow further. If ETH’s market share continues to decline, then USDT could not only surpass ETH again—it may even convert that surpassing into a more enduring state. At that time, the top-three crypto market-cap structure would shift from “BTC > ETH > stablecoin” to “BTC > stablecoin > ETH,” which would be the most direct footnote to the crypto industry’s shift from “technical-narrative dominance” to “infrastructure-first.”
FAQ
Q: Did USDT really surpass ETH to become the second-largest crypto asset?
On June 6, 2026, USDT market cap (about $18.737 billion) was briefly higher than ETH market cap (about $18.3 billion), rising to second place for the first time. But as of June 8, ETH rebounded to above $1,670, and its market cap returned to about $20.15 billion, reclaiming second place. Therefore, this was a short-term surpassing, not a permanent ranking change.
Q: Why has USDT’s market cap been growing continuously?
USDT’s market-cap growth mainly comes from net increases in circulating supply. The issuer earns returns by holding reserve assets such as U.S. short-term Treasuries; this model provides financial sustainability for continued issuance. Global demand for dollar stablecoin trading, payments, and store-of-value continues to expand.
Q: How much did Ethereum’s market share decline?
Ethereum’s share of total crypto market cap fell from its 2021 peak of 21.7% to about 9.3% currently, a decline of more than 12 percentage points. This means that over the past several years, the expansion speed of other assets such as Bitcoin and stablecoins has been significantly faster than ETH’s.
Q: Did USDT ever enter the top three by market cap before?
Yes. In 2020, USDT surpassed XRP and ranked third by crypto asset market cap. However, at that time Ethereum’s market cap was about 2.5 times USDT’s, and the gap was large, without any short-term surpassing.
Q: What is the relationship between stablecoins and U.S. Treasuries?
The reserve assets of mainstream dollar stablecoins are highly concentrated in U.S. short-term Treasuries. Tether holds about $141 billion in Treasuries, making it the 17th largest holder globally. Stablecoin issuers form an important structural source of demand for the short-term Treasury market.
Q: What does this short-term surpassing imply for the future?
It shows that the liquidity scale of stablecoins can already contend with traditional major volatility crypto assets. If stablecoins continue expanding while ETH’s market share keeps declining, ranking changes may occur again in the future. The crypto industry’s value-evaluation logic is slowly shifting from “technical narrative first” to “infrastructure first.”
