MiCA, explained: Europe's stablecoin rulebook

Your exchange quietly stopped listing Tether, and most people never learned why. The reason is MiCA, Europe’s new stablecoin rulebook, and what it asks for tells you almost everything about how safe a stablecoin really is.

What is MiCA, in one breath?

MiCA (Markets in Crypto-Assets) is the European Union’s single rulebook for crypto. Before it, every member state improvised; now there is one set of rules for the whole bloc. For stablecoins, it does two things: it sorts them into types, and it demands they actually hold the money they claim to.

The types matter less than they sound. A stablecoin pegged to one currency (a euro coin, or a dollar coin like USDC) is an “e-money token”. One pegged to a basket of things is an “asset-referenced token”, and faces stricter rules. Almost every stablecoin a normal person touches is the first kind.

What does it actually require?

The core of MiCA is unglamorous and reassuring:

• Full backing. Every coin must be matched one-to-one by real, liquid reserves, held in segregated accounts that are not the issuer’s to gamble with.
• Redemption on demand. You can always swap a coin back for its face value, at any time. That right is written into the law.
• A licensed issuer. A euro or dollar stablecoin must be issued by a bank or a regulated e-money institution, supervised like any other financial firm.
• No yield. Issuers cannot pay you interest for holding the coin. That is the controversial trade-off, more on it below.

In plain terms: the coin in your wallet has to be real money sitting somewhere safe, returnable on demand, run by a supervised company. Closer to a regulated bank balance than to a crypto bet.

Why did USDT vanish from EU exchanges?

Because Tether, which issues USDT, chose not to apply for a MiCA licence. And MiCA does not only bind issuers; it binds the exchanges. A licensed European platform is not allowed to offer an unauthorised stablecoin to the public. So the platforms acted: Coinbase removed non-compliant stablecoins for European users in December 2024, and Binance dropped USDT trading pairs for the European Economic Area on 31 March 2025.

The result is a quiet reshuffle. The world’s largest stablecoin is now hard to find on regulated EU venues, while compliant ones, led by Circle’s USDC and its euro coin EURC, picked up the European ground. Europe did not ban USDT. It set the rules, and USDT did not meet them. The details of who is authorised sit with ESMA, the EU markets regulator.

What does it mean for you, a normal user?

Two things, and they pull in opposite directions.

Safety went up. If you hold a MiCA-regulated stablecoin, it is fully backed, redeemable at face value on demand, and issued by a supervised firm. The 2022-style blow-ups, where an “algorithmic” coin backed by nothing collapsed, are exactly what this rules out.

Choice went down. The biggest coin is off regulated EU platforms, and the no-interest rule means a compliant European stablecoin will not pay you yield the way some offshore ones do. That is the deal MiCA struck: less freedom, much less risk.

For paying and settling, that trade is a good one. You do not want yield on the dollars you are about to split with friends; you want them to be real, instant, and returnable. A regulated, fully-backed dollar coin like USDC is precisely the boring, dependable money a payment app should run on, which is why an app like Spliz settles in it.

Europe first, then the world

MiCA’s stablecoin rules went live in mid-2024. A year later, the United States followed with its own first federal stablecoin law, the GENIUS Act, demanding the same essentials: full backing, redemption, supervision. The two big economic blocs landed in roughly the same place by different routes. The era of the unregulated dollar-on-the-internet is over.

The one-line version

MiCA did not make crypto safe. It made stablecoins boring: fully backed, redeemable, supervised, and a little less free. For money you actually plan to spend, boring is exactly the point.

Europe did not ban the risky stablecoin. It just made the safe one the only one you can buy.

Sources

• ESMA, Markets in Crypto-Assets (MiCA).
• AMF, MiCA dossier (French markets regulator).
• EUR-Lex, the MiCA regulation, full text (EU 2023/1114).
• The White House, GENIUS Act fact sheet (July 2025).
• DefiLlama, stablecoin market cap (USDT as the largest).