Dollar stablecoins surge to $255bn as ECB warns of monetary sovereignty risk

The global stablecoin market has more than doubled in value in less than two years, swelling from $125bn to roughly $255bn, and almost every single token is pegged to the US dollar. That near-total dollar dominance, 99% of the market, has set off alarm bells at the European Central Bank, where officials now argue the trend threatens to entrench the greenback's grip on global finance and undermine the euro's international ambitions.

The dollar's digital incumbency

Stablecoins, cryptocurrencies designed to hold a steady value by tracking an official currency, have moved from niche crypto infrastructure to a meaningful slice of cross-border payments and emerging-market savings. Their growth has been propelled by demand for dollar exposure in countries where local currencies are volatile or banking access is limited. But the concentration is stark: of the $255bn now outstanding, barely a fraction represents euros, yen, pounds or any other currency.

For the ECB, the numbers are not merely academic. The central bank has spent years trying to elevate the euro's global role, a project Christine Lagarde recently framed as a "euro moment" created by shifting geopolitical currents. Yet the stablecoin boom is running in the opposite direction. As one Governing Council member put it, granted anonymity to speak freely: "This trend hurts Europe's efforts to boost the international role of the euro and the geopolitical influence that comes with it."

Monetary sovereignty at stake

The concern extends beyond prestige. Jürgen Schaaf, a long-time digital euro adviser in the ECB's Market Infrastructure and Payments department, warned in a blog post last week that if European consumers and businesses begin using dollar-backed stablecoins at scale, for payments, savings or settlement, the ECB's grip on monetary conditions could loosen. "Without a strategic response, European monetary sovereignty and financial stability could erode," he wrote.

Piero Cipollone, an Executive Board member, has focused on the spillover to emerging markets, describing the phenomenon as "digital dollarisation" and warning of "destabilising effects" on less developed economies. The mechanism is straightforward: when a local currency depreciates, households and firms switch to dollar stablecoins, accelerating capital flight and complicating domestic monetary policy. The ECB fears a similar dynamic could eventually take hold inside the eurozone itself.

The digital euro as strategic counterweight

For years, the ECB has positioned a retail digital euro as the primary answer. The idea is to offer a trusted, euro-denominated digital cash alternative that keeps users inside the eurozone's monetary framework while delivering the speed and programmability that stablecoins promise. Lagarde has redoubled her push, telling the European Parliament in June that "a legislative framework to pave the way for the potential introduction of a digital euro should be put in place rapidly," calling it a "strategic priority" to address the risks posed by stablecoins.

The legislative process, however, is still in its early stages. The European Commission published its proposal in June 2023, but co-legislators, the Parliament and the Council, have yet to reach agreement on critical design choices: holding limits, offline functionality, privacy safeguards, and whether the digital euro should bear interest. Even under an optimistic timeline, a launch before 2027 looks unlikely.

Internal debate: bridge or barrier?

Inside the Governing Council, the mood is broadly sceptical. Officials echo the Bank for International Settlements, which has argued that stablecoins fail to meet the standards of "sound money" and suffer from insufficient regulation. Yet a minority voice acknowledges a limited, transitional role for euro-denominated stablecoins. Schaaf himself noted they "could serve legitimate market needs" and "could also reinforce the international role of the euro", but only as a bridge until the digital euro arrives.

The divide maps roughly onto political economy lines. Right-leaning economists tend to be more open to private-sector innovation in money; left-leaning scholars emphasise public provision and regulatory guardrails. The ECB's own stance reflects its mandate: price stability first, innovation second.

Economists warn against mimicking the US model

A recent paper for the Center for Economic Policy Research by Jens van 't Klooster, Edoardo Martino and Eric Monnet makes the case that Europe would be wrong to replicate the American approach. "This is neither realistic, given the incumbency advantage of the dollar, nor is euroisation of third countries through risky stablecoins per se good for the EU," they wrote. The dollar's head start in stablecoins mirrors its broader network effects in invoicing, reserves and payment messaging, advantages that a late-arriving euro stablecoin cannot easily overcome.

Instead, the trio argues Brussels should double down on what the euro already does well: serve as a safe, liquid, institutionally backed store of value. "The EU should stick to promoting the internationalization of the euro as a safe asset that can be held without constraint," they urged. In this view, third countries seeking to diversify away from dollar-dependent stablecoins would naturally increase demand for euro-denominated assets, government bonds, high-quality corporate paper, and eventually a digital euro, without the need for a European stablecoin industry that replicates the structural fragilities of its US counterpart.

US policy reinforces the trend

The United States has not been a passive beneficiary. The current administration has explicitly backed the development of dollar-linked stablecoins as a tool to shore up the greenback's global dominance, even as uncontrolled budget deficits, erratic trade policy and political interference in economic data reporting undermine confidence in US fiscal stewardship. The recent US-EU trade negotiations served, in the eyes of several ECB officials, as a reminder of how financial infrastructure translates into geopolitical leverage. Who controls the rails controls the rules.

What happens next

The next concrete milestone is the EU co-legislators' negotiation on the digital euro regulation, expected to intensify in the autumn. The ECB's Governing Council will receive a progress report on the preparation phase in October, which will inform a decision on whether to move to the realisation phase. Meanwhile, stablecoin issuers, led by Tether and Circle, continue to expand their dollar networks. The market could pass $300bn before the digital euro's legislative framework is even finalised. The question for Frankfurt is whether the euro's digital answer arrives in time to matter.