Carletti laid out the danger at a Madrid banking conference hosted by IESE Business School, and her warning has since rippled through financial and regulatory circles. The argument is technically straightforward but has profound implications for how Europe handles the next crypto-bank shock.

The vulnerability MiCA built into the system

MiCA classifies stablecoin issuers as electronic money token issuers and orders them to hold their reserve assets in highly liquid instruments—primarily bank deposits and short-term government securities. The intent is to ensure that a holder can always redeem a stablecoin for its face value. In practice, however, this rule chains the stability of a crypto asset to the health of a single banking counterparty. If that bank comes under stress, the stablecoin itself can wobble, triggering a run. Carletti warned that stress at the bank would immediately become stress for the stablecoin, turning a banking problem into a crypto-market problem in minutes.

This is not a theoretical scenario. In March 2023, Silicon Valley Bank collapsed while holding about $3.3 billion of the reserves backing Circle’s USDC, the world’s second-largest stablecoin. USDC briefly lost its dollar peg, and the broader crypto market seized up until U.S. regulators stepped in.

Why Europe cannot copy the U.S. playbook

When SVB and Signature Bank failed, U.S. authorities invoked a systemic risk exception that allowed the FDIC to guarantee all deposits at both institutions—including corporate accounts that exceeded the normal $250,000 insurance limit by billions of dollars. That blanket backstop stopped the run and stabilized USDC almost overnight.

Carletti’s core point is that the same move is not available in Europe. The reasons stack up quickly:

• Deposit insurance is capped at €100,000 ($116,500) per depositor per bank. The multi-billion-euro reserve accounts a stablecoin issuer would need at a single lender are orders of magnitude beyond that ceiling, leaving the bulk of those funds uninsured.
• Europe lacks a single federal backstop. The U.S. decision was taken by one Treasury, one Fed, and one FDIC. In the EU, any comparable “blanket guarantee” would have to navigate national state-aid rules, national budgets, and multiple national resolution authorities—a political and legal maze that makes swift crisis action far harder.
• MiCA does not contain a systemic guarantee mechanism. The regulation mandates the alliance between crypto firms and banks but is silent on what happens if the bank fails. Carletti stated bluntly that the “same decision cannot be easily taken in Europe.”

The ‘double form of weakness,’ explained

Carletti coined the phrase “double form of weakness” to capture a precise contradiction:

1. MiCA forces a tight structural alliance between stablecoin issuers and the banking sector by requiring reserves to be held as bank deposits, but
2. European authorities have no parallel power to extend insurance to those crypto-linked deposits during a crisis.

As she told the audience: “That means that we are forcing a certain alliance of stablecoin and crypto providers with the banking sector without the possibility of extending insurance in the same way, and that to me is a double form of weakness.”

Her diagnosis is that the regulation created the contagion link while simultaneously withholding the remedy. It’s a design flaw that leaves the system more interconnected in good times but more fragile in bad ones.

What regulators are already saying

The warning does not land in a vacuum. European institutions have already been inspecting the crypto-bank nexus from several angles.

• The European Central Bank has acknowledged that MiCA’s stablecoin provisions need careful calibration and has pushed for safeguards to prevent exactly the kind of deposit-run risk Carletti described. ECB Banking Supervision officials have noted that weaknesses in asset-liability management—the same root cause that brought down SVB—can exist even when Basel standards are nominally applied, underscoring that regulation alone does not eliminate the danger.
• The European Parliament has debated the 2023 U.S. bank failures and concluded that while EU banks face stronger liquidity rules than their American mid-sized peers, the rapid growth of stablecoin reserve deposits inside banks creates new concentration risks that were not present when the current insurance cap was written.

Together, these official acknowledgments signal that Carletti’s critique is not an outlier but a concrete policy challenge now being discussed in Brussels and Frankfurt.

The takeaway for markets and policymakers

Carletti’s “double form of weakness” is not an argument against regulating crypto—she has not called for rolling back MiCA. It is a call to finish the job. The regulation built a bridge between crypto and banks to make stablecoins safer; her warning is that Europe has not yet built the guardrails to handle a crisis that travels across that same bridge. Without a mechanism to backstop large uninsured deposit exposures tied to stablecoin reserves, the EU is asking its banking system to absorb a risk it cannot contain—a gap the U.S. closed in a single weekend in 2023, but Europe cannot close today.

Carletti laid out the danger at a Madrid banking conference hosted by IESE Business School, and her warning has since rippled through financial and regulatory circles. The argument is technically straightforward but has profound implications for how Europe handles the next crypto-bank shock.

The vulnerability MiCA built into the system

MiCA classifies stablecoin issuers as electronic money token issuers and orders them to hold their reserve assets in highly liquid instruments—primarily bank deposits and short-term government securities. The intent is to ensure that a holder can always redeem a stablecoin for its face value. In practice, however, this rule chains the stability of a crypto asset to the health of a single banking counterparty. If that bank comes under stress, the stablecoin itself can wobble, triggering a run. Carletti warned that stress at the bank would immediately become stress for the stablecoin, turning a banking problem into a crypto-market problem in minutes.

This is not a theoretical scenario. In March 2023, Silicon Valley Bank collapsed while holding about $3.3 billion of the reserves backing Circle’s USDC, the world’s second-largest stablecoin. USDC briefly lost its dollar peg, and the broader crypto market seized up until U.S. regulators stepped in.

Why Europe cannot copy the U.S. playbook

When SVB and Signature Bank failed, U.S. authorities invoked a systemic risk exception that allowed the FDIC to guarantee all deposits at both institutions—including corporate accounts that exceeded the normal $250,000 insurance limit by billions of dollars. That blanket backstop stopped the run and stabilized USDC almost overnight.

Carletti’s core point is that the same move is not available in Europe. The reasons stack up quickly:

• Deposit insurance is capped at €100,000 ($116,500) per depositor per bank. The multi-billion-euro reserve accounts a stablecoin issuer would need at a single lender are orders of magnitude beyond that ceiling, leaving the bulk of those funds uninsured.
• Europe lacks a single federal backstop. The U.S. decision was taken by one Treasury, one Fed, and one FDIC. In the EU, any comparable “blanket guarantee” would have to navigate national state-aid rules, national budgets, and multiple national resolution authorities—a political and legal maze that makes swift crisis action far harder.
• MiCA does not contain a systemic guarantee mechanism. The regulation mandates the alliance between crypto firms and banks but is silent on what happens if the bank fails. Carletti stated bluntly that the “same decision cannot be easily taken in Europe.”

The ‘double form of weakness,’ explained

Carletti coined the phrase “double form of weakness” to capture a precise contradiction:

1. MiCA forces a tight structural alliance between stablecoin issuers and the banking sector by requiring reserves to be held as bank deposits, but
2. European authorities have no parallel power to extend insurance to those crypto-linked deposits during a crisis.

As she told the audience: “That means that we are forcing a certain alliance of stablecoin and crypto providers with the banking sector without the possibility of extending insurance in the same way, and that to me is a double form of weakness.”

Her diagnosis is that the regulation created the contagion link while simultaneously withholding the remedy. It’s a design flaw that leaves the system more interconnected in good times but more fragile in bad ones.

What regulators are already saying

The warning does not land in a vacuum. European institutions have already been inspecting the crypto-bank nexus from several angles.

• The European Central Bank has acknowledged that MiCA’s stablecoin provisions need careful calibration and has pushed for safeguards to prevent exactly the kind of deposit-run risk Carletti described. ECB Banking Supervision officials have noted that weaknesses in asset-liability management—the same root cause that brought down SVB—can exist even when Basel standards are nominally applied, underscoring that regulation alone does not eliminate the danger.
• The European Parliament has debated the 2023 U.S. bank failures and concluded that while EU banks face stronger liquidity rules than their American mid-sized peers, the rapid growth of stablecoin reserve deposits inside banks creates new concentration risks that were not present when the current insurance cap was written.

Together, these official acknowledgments signal that Carletti’s critique is not an outlier but a concrete policy challenge now being discussed in Brussels and Frankfurt.

The takeaway for markets and policymakers

Carletti’s “double form of weakness” is not an argument against regulating crypto—she has not called for rolling back MiCA. It is a call to finish the job. The regulation built a bridge between crypto and banks to make stablecoins safer; her warning is that Europe has not yet built the guardrails to handle a crisis that travels across that same bridge. Without a mechanism to backstop large uninsured deposit exposures tied to stablecoin reserves, the EU is asking its banking system to absorb a risk it cannot contain—a gap the U.S. closed in a single weekend in 2023, but Europe cannot close today.