ECB: DeFi concentration may trigger MiCA regulation

• European Central Bank (ECB) staff published a working paper on March 26 analyzing governance concentration in four major DeFi protocols: Aave, MakerDAO, Ampleforth, and Uniswap.
• The study found that despite having thousands of unique addresses, the top 100 holders control more than 80% of the token supply in each examined protocol.
• Findings suggest that many DAOs may not meet the "fully decentralized" criteria required to remain outside the scope of the European Union's Markets in Crypto-Assets (MiCA) regulation.

Governance Concentration and Token Holdings

The ECB paper highlights a significant gap between the theoretical decentralization of DeFi and its practical implementation. Based on data snapshots from November 2022 and May 2023, the researchers discovered that governance tokens are heavily concentrated among a small elite. Centralized entities, particularly Binance, were identified as the largest centralized exchange holders across all four protocols.

The distribution of voting power is even more consolidated when looking at active participation:

• In Ampleforth, the top 20 voters control 96% of delegated power.
• In MakerDAO, the top 10 voters command 66% of the power.
• In Uniswap, the top 18 voters hold 52% of the power.

Implications for MiCA Regulation

The concentration of power creates a regulatory dilemma for the European Union. Under the MiCA framework, services that are deemed "fully decentralized" are currently excluded from oversight. However, the ECB paper argues that if a small group of founders, developers, or centralized exchanges holds the majority of influence, the protocol cannot be considered truly decentralized. This makes it difficult for regulators to identify "anchor points"—specific entities or individuals who can be held accountable for the protocol's actions.

Approximately one-third of top voters remain unidentified in public data, further complicating transparency. Among those identifiable, the largest groups are individual whales and Web3 companies, followed by venture capital firms and university blockchain societies.

Practical Governance and Risk Management

Most governance proposals in these DAOs focus on risk parameters, which directly impact the safety and stability of the protocols. The paper notes that public data often fails to distinguish whether holdings belong to original founders, developers, or protocol treasuries, or if exchange wallets are voting using customer assets.

Kavi Jain, a senior research associate at Bitwise, noted that many large protocols maintain a small group with "meaningful influence," especially during their early stages. The ECB researchers concluded that while DeFi promises to remove intermediaries, it often creates new forms of concentration and governance risks that mirror traditional finance, making it challenging to apply a one-size-fits-all regulatory approach.