ESCB Urges EU to Scrap MiCA Stablecoin Deposit Rule Over Banking System Risks

The final shape of the European Union's landmark crypto regulation will be determined in the technical implementation phase, where the European System of Central Banks (ESCB) has formally intervened to block a mandate requiring stablecoin issuers to hold a strict percentage of their reserves in commercial bank deposits. This intervention matters because the central banks dictate the actual capital flows, and they are warning that the rule, designed to protect crypto investors, would inadvertently create a systemic liquidity risk for the traditional banking sector.[1][2]

Under the Markets in Crypto-Assets (MiCA) framework, issuers of "significant e-money tokens"—the regulatory term for large-scale fiat-pegged stablecoins—are currently required to park at least 60% of their backing assets as cash deposits at credit institutions. The legislative intent was to ensure that token holders could always redeem their digital assets for euros at par value, backed by the security of the regulated European banking system.[5]

However, the ESCB and the European Central Bank (ECB) have identified a fatal flaw in this architecture: it creates a direct transmission mechanism for financial contagion. If a major stablecoin faces a sudden crisis of confidence and users rush to redeem their tokens en masse, the issuer would be forced to rapidly withdraw billions of euros in cash from its commercial bank partners to meet those redemptions.[3][4]

The requirement effectively transforms a crypto run into a traditional bank run, the central banking authority noted in its assessment, urging lawmakers to scrap the 60% deposit floor entirely. A sudden, massive outflow of deposits from a commercial bank would drain its liquidity reserves, potentially destabilizing the institution and forcing it to sell off other assets at a loss to cover the withdrawals.[1][5]

The scale of the potential risk is tied to the rapid growth of the digital asset market. Globally, the stablecoin sector commands a market capitalization exceeding $160 billion in 2026. While euro-denominated stablecoins currently make up a smaller fraction of that total compared to US dollar-pegged tokens, the implementation of MiCA is expected to spur significant domestic growth. If those tokens scale to tens of billions of euros, the concentration of flighty deposits in a handful of European banks would become a structural vulnerability.[2][3]

Commercial banks themselves have been fighting back against the strict reserve rules from the opposite side of the ledger. Under Basel III capital requirements, banks must maintain a high Liquidity Coverage Ratio (LCR). Because stablecoin deposits are considered highly volatile and prone to sudden flight, banks are required to hold a larger proportion of High-Quality Liquid Assets (HQLA) against them, making these deposits expensive and largely unprofitable to maintain.[6]

As an alternative to the commercial bank deposit mandate, the ESCB is suggesting that stablecoin issuers should instead be required or permitted to hold their reserves in highly liquid, low-risk instruments, such as short-term government bonds or central bank reserves. These assets can be quickly liquidated in the open market during a redemption surge without directly draining the cash reserves of commercial credit institutions.[4][5]

The push to rewrite the rules places the European Commission and the European Banking Authority (EBA) at a critical juncture. They must now decide whether to formally amend the regulatory technical standards before the final phases of the MiCA framework are fully entrenched. The outcome will set a global precedent for how fiat-backed digital tokens integrate with traditional finance, shifting the regulatory focus from merely protecting token holders to insulating the broader economy from digital asset volatility.[1][2]