No-KYC Trading After MiCA Phase 2

The EU’s Markets in Crypto-Assets Regulation (MiCA) entered its second major phase at the end of 2024, bringing full KYC requirements for crypto-asset service providers (CASPs) into force. For EU crypto users, the obvious question is: what does this mean for no-KYC trading? Can you still trade on-chain from a self-custody wallet?

This article breaks down what changed after MiCA Phase 2, where the practical limits are, and how OneKey wallet users can navigate the new environment.

MiCA Phase 2: What changed?

MiCA was rolled out in two main phases. The first phase, in June 2024, covered rules for issuing asset-referenced tokens (ARTs) and e-money tokens (EMTs). The second phase, in December 2024, extended the framework to CASPs, including crypto exchanges, wallet service providers, and trading platforms.

The full regulatory text is available via EUR-Lex MiCA.

Key requirements under MiCA Phase 2 include:

• CASPs serving EU users must obtain authorization in an EU member state.
• CASPs must implement full KYC/AML procedures, including customer identity checks and ongoing transaction monitoring.
• Transfers involving self-custody wallet addresses above EUR 1,000 may require ownership verification under the Transfer of Funds Regulation (TFR).

MiCA treats CASPs and individual users differently

The key point to understand is that MiCA obligations generally apply to CASPs, not to individual users.

That means an EU user holding crypto in a OneKey hardware wallet, or connecting a self-custody wallet to a decentralized protocol, is not directly regulated by MiCA simply for doing so.

The uncertainty around the “fully decentralized” exemption

Article 2(3) of MiCA exempts crypto-asset services provided in a “fully decentralized manner” without an intermediary. However, ESMA is still working on technical standards that will help define what “fully decentralized” actually means in practice.

That matters because it will shape which DeFi protocols can rely on the exemption.

Current grey areas include:

• Whether a protocol with upgradeable contracts or admin keys can still be considered “fully decentralized.”
• Whether a protocol is affected if its frontend is maintained by a centralized team with EU users.
• Whether DAO governance counts as intermediary involvement.

ESMA’s final technical standards are expected to provide more clarity in 2026, which should make the compliance status of different DeFi protocols easier to assess.

What access looks like after MiCA Phase 2

After Phase 2, EU traders are seeing different levels of impact depending on the type of service.

Centralized exchanges

Centralized exchanges serving EU users must complete MiCA CASP registration and run full KYC. Offshore exchanges that are not registered should not, in theory, provide services to EU users, although enforcement may vary by member state.

For EU users, trading on an unregistered platform may carry legal and access risk.

DEXs and on-chain perps protocols

Major on-chain perps protocols such as Hyperliquid, dYdX, and GMX can still generally be accessed through self-custody wallets at the smart contract level, based on the “fully decentralized” exemption. They do not currently operate under the same MiCA CASP licensing model as centralized exchanges.

That said, some protocol frontends have started restricting EU IP addresses to reduce regulatory risk for the teams operating those interfaces.

Self-custody wallet software

Pure self-custody wallet software, such as OneKey, does not provide a regulated custody service and is not treated the same way as a custodial wallet provider under the MiCA CASP framework. EU users can still download and use self-custody wallet software.

On-ramps and off-ramps are where MiCA matters most

For most EU users, the biggest practical impact is not on-chain trading itself. It is fiat access.

• Most mainstream fiat on-ramps and off-ramps, including bank transfers and card purchases, are handled by licensed CASPs and require full KYC.
• TFR rules may require CASPs to verify ownership of self-custody wallet addresses for transfers above EUR 1,000.
• P2P fiat channels in the EU are subject to stricter scrutiny than in the past.

A practical approach is to complete KYC once with a licensed on-ramp, move assets into a self-custody wallet, and then conduct on-chain activity without repeated KYC at every trading step. When cashing out, use a KYC’d account and keep clear records for tax reporting.

A compliant self-custody trading workflow after MiCA

For EU users who want to continue no-KYC on-chain trading within the MiCA environment, the cleanest workflow is:

1. Use a licensed CASP to deposit fiat or buy crypto, completing one-time KYC.
2. Transfer assets to your OneKey wallet and take self-custody.
3. Use OneKey Perps to connect to on-chain trading protocols.
4. Keep profits on-chain or transfer funds back to a licensed CASP account when you need to exit.

In this workflow, only steps 1 and 4 involve a regulated CASP. Steps 2 and 3 take place in a self-custody environment and do not add an extra KYC layer.

FAQ

Q1: Does MiCA ban EU users from using DEXs?

No. MiCA does not explicitly ban EU users from using decentralized protocols. Its core obligations apply to CASPs, and “fully decentralized” protocols may be exempt.

At the moment, EU users accessing exempt protocols through self-custody wallets do not face a direct MiCA prohibition. However, users should keep an eye on ESMA’s technical standards as they develop.

Q2: Does MiCA require self-custody wallet software to register?

Not currently. MiCA distinguishes between self-custody wallet software and custodial wallet services.

Wallet providers that custody user assets may need CASP authorization. Wallets that simply provide software tools while users control their own private keys are not treated the same way.

Q3: Did MiCA change tax obligations for EU traders?

MiCA does not directly rewrite tax rules. However, because CASPs must collect more KYC and transaction data, tax authorities may have better access to user activity through regulated platforms.

The underlying tax obligations depend on each EU member state. Those obligations may not have changed, but enforcement and data visibility may improve.

Q4: What happens if I use a DEX that is later treated as a CASP?

Regulators usually distinguish between individual users and protocol operators. If a protocol is later found to be an unregistered CASP, enforcement would typically focus on the operators or service providers rather than ordinary users.

However, if a protocol is explicitly prohibited and a user continues to access it afterward, that may create legal risk.

Q5: Does MiCA affect stablecoins such as USDC or USDT?

Yes, potentially. MiCA sets specific requirements for e-money tokens, such as USDC, and their issuers must be properly authorized in the EU.

This may affect which stablecoins remain widely available to EU users. For example, Tether has previously paused its EU compliance plans. Users should monitor the MiCA compliance status of the stablecoins they rely on.

Bottom line: self-custody on-chain trading remains open for now

MiCA Phase 2 has significantly reshaped centralized crypto services in the EU. Its direct impact on self-custody wallets and decentralized protocols is currently more limited.

EU users can still follow a practical path: use a compliant fiat entry point, hold assets in self-custody, and trade on-chain through decentralized venues where available.

OneKey wallet and OneKey Perps are designed for this workflow. Download OneKey, secure your assets in self-custody, and use OneKey Perps when you want a practical on-chain perps trading route without adding unnecessary custody layers.

Risk warning: This article is for informational purposes only and is not legal or financial advice. MiCA implementation details are still evolving, and ESMA technical standards may further clarify how different scenarios are treated. Enforcement may also vary across EU member states. Consult a qualified legal professional before making decisions that may have regulatory consequences. Crypto trading involves significant risk and may result in the loss of your entire principal.