USDC Just Overtakes USDT in Euro Trading: What MiCA Already Did to the Stablecoin War and What Comes Next

A quiet revolution has happened in European crypto trading, and most global investors have not noticed it. Circle’s USDC has overtaken Tether’s USDT in stablecoin trading against the euro, according to a new report from market data firm Kaiko — the clearest evidence yet that regulation, not marketing, is reshaping which stablecoins win.

The numbers tell a striking story. USDC now accounts for 56% of stablecoin trading against the euro, up from just 10% in January 2024, according to Kaiko data. USDC has also overtaken USDT in euro-denominated trading liquidity, with its order books now roughly 40% deeper than its rival’s. Tether remains the larger stablecoin globally, with a circulating supply about 2.5 times that of USDC — but in Europe, the pecking order has flipped.

## How MiCA Rewrote the Rules

The shift accelerated after major exchanges restricted USDT trading for customers in the European Economic Area under the Markets in Crypto-Assets Regulation, the EU’s comprehensive crypto rulebook. Rather than risk offering a stablecoin that had not secured the bloc’s e-money token authorization, platforms pushed European users toward compliant alternatives — and USDC was the biggest beneficiary.

Kaiko described stablecoin-to-euro trading pairs as a “main on-ramp and off-ramp for European customers,” allowing them to exchange euros for US dollar-pegged stablecoins when entering or exiting cryptocurrency markets. In other words, when European traders cash in or out today, they are increasingly doing it through USDC.

The regulatory milestone behind the data came about two weeks ago, when the European Banking Authority designated USDC as the EU’s first “significant e-money token” under MiCA. That classification places the stablecoin under direct EBA supervision and subjects its issuer, Circle, to additional regulatory requirements — a burden, but also a stamp of legitimacy that Tether has not obtained in the bloc.

## What It Means for Everyday Investors

If you trade crypto in Europe, the change is already visible in your order books. Deeper USDC-euro liquidity means tighter spreads and lower slippage when moving between euros and crypto. Traders who stuck with USDT pairs on restricted platforms have found their options narrowing as exchanges comply with MiCA.

For holders outside Europe, the lesson is different: regulatory status is now a competitive weapon. Tether’s dominance was built on being the default offshore dollar token. The Kaiko data shows that when a major jurisdiction sets compliance requirements, that default status can evaporate quickly — at least within that jurisdiction.

## Germany’s Authorization Race Shows Where the Market Is Heading

The euro-pair data is only the most visible symptom of a broader realignment. Across the EU, crypto firms have been racing to secure MiCA licenses as compliance deadlines loom, with Germany emerging as the leading hub for authorizations. Every licensed exchange operating in the bloc must decide which stablecoins it can lawfully offer — and each of those decisions chips away at the network effects that once made USDT unchallengeable. Liquidity, once it migrates, tends to stay migrated: traders go where the order books are deepest, and issuers invest where the rules are clearest.

## The American Sequel May Already Be Written

Kaiko believes the United States is taking a similar approach to stablecoin regulation under the GENIUS Act, raising the possibility that American exchanges could see the same shift in trading activity observed in Europe.

The timeline is already moving. On October 21, the Office of the Comptroller of the Currency issued its first final rule under the law, establishing reserve and redemption requirements for stablecoin issuers under its supervision, effective January 18, 2027. Beginning in July 2028, US platforms will also face restrictions on offering stablecoins from issuers that do not meet the law’s approval requirements.

The regulatory changes could favor Circle, which has pursued authorization in both Europe and the US. Tether has taken a different approach, launching a separate US-focused stablecoin called USAT rather than submitting its flagship token to the full American regulatory framework.

For a technology ecosystem built on the promise of digital dollars, the euro may seem like a sideshow. It is not. The Kaiko report shows the region where regulation is most advanced is also where the market has changed most decisively — and it offers the cleanest real-world test yet of what happens when compliance becomes the price of admission. What Europe demonstrated is that once rules bind, trading flows reorganize around whichever stablecoin cleared the bar first. That advantage compounds: deeper liquidity attracts more traders, more traders attract more integrations, and the cycle repeats.

## The Bottom Line

For years, the stablecoin conversation was about size — and Tether still wins that contest hands down. But the Kaiko report shows the next phase of the competition will be about regulatory access, market by market. Europe has already voted with its order books: compliance turned USDC from a 10% also-ran into the dominant euro stablecoin pair in under three years. If the GENIUS Act produces even a fraction of that effect in the US, the global stablecoin hierarchy could look very different by 2028. Watch the January 2027 OCC compliance date — that is when the American version of this story starts in earnest.

Sources: Kaiko report via Cointelegraph, European Banking Authority. Article by Raj Patel, BitcoinsNews.com.

Disclaimer: This article is for informational purposes only and does not constitute financial advice.