Speaking in a June 1 address titled "From money market funds to stablecoins: lessons for central banks," Schnabel laid out a case that stablecoins are not a niche crypto phenomenon but a systemic monetary challenge. The global stablecoin market now sits at approximately $322 billion in total capitalization, a figure that exceeds the foreign exchange reserves of 95 countries, including the UK and Canada, according to CoinDesk data published last week.

Dollar Dominance at the Core

The structural problem Schnabel identified is straightforward: nearly all stablecoins in circulation are denominated in US dollars. Tether (USDT) and Circle's USDC together account for roughly 90% of total stablecoin market capitalization. Euro-denominated stablecoins, by contrast, hold a market cap of approximately 500 million euros, a fraction of a percent of the total. Schnabel noted that 85% of crypto trading platform volume involves stablecoin-to-crypto exchanges, making them central infrastructure for the broader digital asset economy.

She identified three specific risks from this concentration: financial instability resembling the money market fund crises of 2008 and 2020, disruption to monetary policy transmission within the eurozone, and a structural reinforcement of dollar hegemony globally. "Increased use of stablecoins could reinforce the dollar's global dominance, undermine some nations' ability to set monetary policy, and even diminish the role of the euro," she said. ECB internal research cited in the speech concluded that "significant dollar-denominated stablecoin issuance could amplify the international transmission of US monetary policy."

Schnabel also drew a distinction between issuers on reserve quality. Tether holds illiquid assets including commodities, loans, and cryptocurrency as reserves, while Circle's USDC holds sovereign bonds. Even so, she argued that USDC's structure creates spillover risks because its underlying assets settle on a T+1 or T+2 schedule while crypto markets operate around the clock.

The denomination gap is not a problem unique to Europe. Yen-pegged stablecoins represent less than 0.01% of the market cap of dollar-pegged coins, despite Japan's established regulatory framework for digital assets. That figure suggests that regulatory design alone cannot shift denomination dominance and foreshadows the scale of the challenge facing the euro stablecoin market.

Regulation Is Not Enough

The EU's existing crypto framework, MiCAR (Markets in Crypto-Assets Regulation), already sets reserve requirements for stablecoin issuers: 30% in bank deposits for standard issuers and 60% for those classified as significant. Schnabel's position is that this alone is insufficient. "Central banks cannot remain passive observers of these developments," she said. "Central bank money must continue serving as an anchor in tokenized financial systems." The digital euro, in her framing, is the public-money counterweight that regulation cannot replicate.

The ECB is targeting a first digital euro issuance in 2029, contingent on EU legislative adoption. The European Parliament was expected to finalize its position in May 2026, with Council negotiations already complete. In the near term, the ECB plans to publish technical standards this summer, followed by the Q3 2026 launch of Pontes, a distributed ledger settlement solution for central bank money in tokenized markets. A 12-month pilot covering four real-world use cases is scheduled to begin in the second half of 2027. Total development costs are estimated at around 1.3 billion euros, with annual operating costs of approximately 320 million euros thereafter. ECB crisis modelling has confirmed that a per-user holding limit of up to 3,000 euros would remain financially stable under stress scenarios, a design feature intended to prevent large-scale flight from commercial bank deposits during periods of market turbulence.

The Stakes Are Higher Outside Europe

Schnabel's remarks were directed at a European audience, but the risks she described are especially acute in Africa and South Asia, where dollar stablecoins are already woven into daily financial activity.

In Nigeria, South Africa, Kenya, and Ethiopia, USDT and USDC are used to hedge local currency depreciation, bypass capital controls, and move money across borders, according to reporting by TechCabal and Investing.com Africa crypto analysis. In Nigeria, USDT regularly trades at a premium above the official bank rate, reflecting demand that outpaces formal monetary channels. Africa's remittance market totals roughly $95 billion annually, and stablecoin-based rails are claiming a growing share of those flows. Western Union launched a dollar-backed stablecoin called USDPT on Solana in late 2025, targeting African remittance corridors specifically.

The BIS has found that rising stablecoin flows correlate with subsequent depreciation of local currencies in emerging markets. The BIS has also confirmed that stablecoins can facilitate circumvention of capital controls in emerging markets, a finding that connects directly to the dynamics already visible in Nigeria. If dollar stablecoin adoption accelerates without countervailing infrastructure, central banks across Africa face the same loss of monetary policy control that Schnabel warns Europe is approaching, but with far fewer tools to respond. Nigeria's eNaira, Ghana's eCedi, and South Africa's Project Khokha initiatives remain early-stage and lack the liquidity or merchant acceptance to compete with USDT at scale.

India, the world's largest remittance recipient at over $120 billion in 2024 according to the World Bank, is further along with its e-Rupee pilot, which grew 334% year-on-year to roughly $122 million in circulation by March 2025. That is still negligible compared to actual payment volumes. Pakistan and Bangladesh, also large remittance recipients, have restrictive or unclear crypto regulation, leaving populations more exposed to dollar-stablecoin dependency and to the spillover effects of Federal Reserve rate decisions moving through stablecoin channels. Elsewhere in the region, Sri Lanka and Nepal have formally banned or heavily restricted cryptocurrency, but enforcement remains limited and dollar stablecoin circulation continues informally, a pattern that illustrates how prohibition alone does not eliminate monetary exposure.

What Comes Next

The ECB's companion project Appia, aimed at cross-border wholesale CBDC settlement, is also in development alongside Pontes. Together these systems could influence how payment rails are designed globally, including in corridors that connect Europe to South Asia and Africa. For now, dollar-denominated stablecoin pools remain dominant in global decentralized finance. In this analysis, Schnabel's speech is a significant institutional intervention, but the structural forces driving dollar denomination in digital assets are rooted in network effects and reserve currency inertia that no single regulatory framework or CBDC launch is likely to reverse quickly.