The United States freezes $344 million worth of cryptocurrency from Iran

The United States has taken action against Iran again.

According to reports from CCTV News and other media outlets, on April 24th local time, the Office of Foreign Assets Control (OFAC) of the U.S. Department of the Treasury issued a new round of sanctions against Iran and simultaneously updated the “Specially Designated Nationals List.” Notably, this time the U.S. not only targeted traditional financial institutions, accounts, and transaction networks but also included multiple cryptocurrency wallet addresses related to Iran in the sanctions, involving approximately $344 million in frozen crypto assets.

Reuters also mentioned that U.S. Treasury Secretary Scott Bessent stated on social media that the department is sanctioning multiple wallets related to Iran and has frozen $344 million worth of crypto assets.

More critical information comes from Tether’s own announcement. According to Tether, in cooperation with OFAC and U.S. law enforcement agencies, it has frozen over $344 million worth of USDT in two addresses. The announcement also notes that these addresses were identified after law enforcement provided relevant information, and the freezing was to prevent further transfer of the related funds.

Therefore, if you simply interpret this news as “the U.S. freezing Iranian cryptocurrency assets,” that’s not enough.

A deeper understanding should be that this is the U.S. continuing to migrate its well-established offline financial sanctions capabilities onto the blockchain world.

In the past, the U.S. froze bank accounts; now it is freezing on-chain addresses. Previously, the U.S. cut off dollar clearing; now it is also cutting off liquidity for stablecoins.

An Invisible Financial Control Power

In the past, when discussing the U.S.'s global financial influence, it was often not about how many warships it deployed or how many statements it issued, but about the powerful financial tools it controls.

The dollar clearing system, international banking networks, SWIFT communication system, OFAC sanctions list, compliance obligations of U.S. financial institutions—these elements together constitute the real strength of U.S. financial control.

Any country, company, or even individual, as long as your funds heavily depend on the dollar system, it’s difficult to completely bypass these rules. This kind of sanctions enforcement was more straightforward in the past: bank accounts frozen, dollar transactions cut off, companies listed on sanctions lists, financial institutions hesitant to serve you. Even if transactions occur outside the U.S., as long as they involve dollars or U.S. financial institutions, or even if related institutions fear secondary sanctions, the U.S. has ways to make those funds difficult to move.

That’s why many countries, after being sanctioned by the U.S., have sought to find channels outside the dollar system.

Cryptocurrencies Are Not the Safe Haven You Imagine

At one point, many people believed that cryptocurrencies could be a potential escape route, and this logic is understandable. On-chain transfers don’t require banks, don’t go through traditional clearing systems, and don’t rely on SWIFT. As long as you have a wallet address and private key, theoretically, you can transfer funds. Over the past few years, sanctioned countries and some gray/black market funds have tried to use crypto assets to transfer value.

But this incident shows that things are not that simple.

Blockchains are not a parallel universe completely detached from real-world financial order. Especially stablecoins, which circulate on-chain but behind them rely heavily on centralized issuers, reserves, redemption, compliance, and freezing mechanisms.

Many people casually lump Bitcoin, Ethereum, USDT, USDC, and others into the same category of “cryptocurrencies.” While that’s fine in everyday chat, from a legal and power structure perspective, they are very different.

Bitcoin is genuinely closer to a decentralized asset. It has no issuing company, no single manager, and no entity that can simply press a “freeze” button upon law enforcement’s request. As long as users control the private keys, there is no central authority that can directly freeze your Bitcoin holdings.

Of course, this doesn’t mean Bitcoin is completely immune to law enforcement in practice. Authorities can still track and seize Bitcoin through exchanges, custodians, OTC traders, on-chain analysis, judicial seizures, etc. But at the protocol level, Bitcoin itself has no issuer that can unilaterally freeze a specific address’s BTC.

This is fundamentally different from stablecoins.

USDT, USDC, and other mainstream stablecoins are essentially centralized on-chain dollar claims issued by institutions. They circulate on-chain like other crypto assets, but behind them are issuing companies, reserves, bank accounts, compliance teams, and regulatory pressures. From day one, stablecoins have not been purely decentralized assets.

The Dual Nature of Stablecoins

Because of this, stablecoins have a very clear dual nature.

On one hand, they are indeed faster, cheaper, and more suitable for cross-border transfers than traditional banking. Especially in regions where banking infrastructure is underdeveloped, opening dollar accounts is difficult, and cross-border remittances are costly, stablecoins have already, in effect, taken on some functions of “digital dollars.” Many ordinary users use USDT not because they understand blockchain deeply, but because it’s convenient, liquid, fast, and widely accepted.

On the other hand, stablecoins are not like Bitcoin, which has no issuer. The issuer can cooperate with law enforcement, freeze addresses, and restrict fund transfers. Tether’s announcement clearly states that once a wallet is identified as involved in sanctions evasion, crime networks, or other illegal activities, the issuer can take restrictive measures.

This is something many ordinary users have not fully realized.

You might think you hold “on-chain money,” but from a power structure perspective, what you hold is actually a liability issued by a centralized company. Whether this liability can circulate often depends not only on your private keys but also on the relationship between the issuer, exchanges, custodians, law enforcement, and regulators. Private keys control transfer signatures, but they may not be able to counteract the issuer’s contractual freezing ability or the overall blocking by centralized exchanges and compliance services.

Why Does the U.S. Promote Stablecoins?

This is also why the U.S. has been supportive of compliant stablecoins in recent years.

Of course, the U.S. supports stablecoins for reasons like financial innovation, payment efficiency, reinforcing the dollar’s demand, and promoting the crypto industry. But from the perspective of the international financial order, there’s a more pragmatic layer: stablecoins allow the dollar system to extend from bank accounts onto on-chain addresses.

In the past, using dollar accounts meant the U.S. could influence you through the banking system; now, using dollar stablecoins, the U.S. can still influence you via stablecoin issuers, centralized exchanges, custodians, and compliance providers. The technology has changed, the account form has changed, wallet addresses have replaced bank accounts, but the underlying control logic has not fundamentally changed.

The U.S. isn’t simply opposed to cryptocurrencies.

On the contrary, the U.S. is increasingly aware that in the crypto asset world, there are two types of assets:

One is truly decentralized assets like Bitcoin, which are difficult to control at a single point; the other is stablecoins and centralized crypto services that can be incorporated into compliance frameworks, cooperate with law enforcement, and be subject to financial sanctions.

For the latter, the U.S. may not oppose, and might even encourage, their compliant development. The reason is pragmatic: as long as stablecoins remain pegged to the dollar, issued by regulated centralized entities, and cooperate with OFAC, FinCEN, DOJ, and other authorities, they are not substitutes for the dollar but new interfaces to the dollar system.

Previously, dollars flowed through banks and clearing systems; now, they can also flow via stablecoins on public blockchains. The U.S. can influence through stablecoin issuers, centralized exchanges, on-chain analysis firms, and compliance providers. The financial system appears more open, but the core control issues remain—just expressed through different technology.

A Reminder for Crypto Industry Participants

This incident is a direct reminder to crypto industry players.

If you are an exchange, wallet provider, payment company, custodian, market maker, or any Web3 financial service involved in stablecoin circulation, you can no longer simply say “I am just a tech platform” or “I am just an on-chain tool.” As long as your business involves stablecoins—especially USD-pegged stablecoins—you are within the radius of global sanctions and compliance frameworks. The old KYC, AML, and sanctions screening that traditional finance used now also applies to many Web3 entities—just the objects of scrutiny have shifted from bank accounts to wallet addresses, from remittance paths to on-chain fund flows.

For entrepreneurs, this is also very pragmatic.

Many projects like to talk about Web3, decentralization, and on-chain finance. But if you look at your actual business structure, where the settlement assets are USDT, customer deposits and withdrawals rely on centralized exchanges, custody depends on centralized institutions, and risk control depends on third-party on-chain analysis firms—then from a legal and regulatory perspective, your project may not be truly decentralized but rather a traditional financial service wrapped in a blockchain interface.

Regulators are not concerned with your slogans but with how your funds move, who your customers are, who controls the assets, and who bears the risks. If you do payments, you face AML and sanctions screening; if you do custody, you face asset freezing and law enforcement cooperation; if you do trading, you face KYC, KYT, and suspicious transaction detection; if you do stablecoin-related services, you cannot avoid issues like issuer regulation, reserve assets, redemption mechanisms, blacklists, and judicial assistance.

For ordinary users, this also offers a simple reminder: USDT does not equal Bitcoin.

Many people buy USDT because they find it convenient, stable, and liquid. That’s a fair judgment—USDT indeed plays a crucial liquidity role in the global crypto market. But if you think USDT is an asset that cannot be frozen, completely outside regulation, and independent of the financial system, you are mistaken.

The “stability” of stablecoins comes from centralized arrangements behind the scenes. Because of this centralization, they can be stable, redeemable, widely circulated, and frozen by issuers when necessary.

This is not a matter of good or bad but a structural reality of the industry.

If what you want is efficiency, liquidity, and dollar valuation, stablecoins have their value. But if you seek complete censorship resistance, unfreezability, and independence from the financial order, stablecoins are unlikely to be the answer from the start. Many enjoy the convenience they bring but mistakenly imagine them as decentralized assets like Bitcoin—that’s a fundamental misperception.

For some sovereign states, especially those seeking financial security, this news has even greater practical significance.

Over the past few years, many countries have discussed reducing reliance on the dollar system. Some want to develop their own settlement currencies, some push for central bank digital currencies, and others try to bypass traditional sanctions with crypto assets. But if the final choice is still to use dollar stablecoins, it’s just replacing dollar accounts with dollar tokens. The form changes, but the underlying power structure remains.

You may no longer use U.S. bank accounts, but you are using dollar stablecoins within U.S. regulatory reach. You may not use SWIFT, but you are using stablecoins issued by entities that cooperate with OFAC. You think you’ve moved from off-chain to on-chain, but U.S. sanctions tools are also moving onto the chain with you.

For a country truly committed to financial security, this is not a minor technical issue but a fundamental question of who controls the financial infrastructure.

Therefore, real financial security is not just asking “Is it on-chain?” but more fundamentally: Who issues the assets? Where are the reserves? Who controls redemptions? Who is affected by compliance obligations? Can addresses be frozen? Is the critical infrastructure in someone else’s hands? Without clear answers, talking only about “on-chain finance,” “digital currencies,” or “stablecoin innovation” remains superficial.

Of course, it’s also wrong to think that because stablecoins can be frozen, they have no value. That’s an overly simplistic judgment.

The value of stablecoins precisely comes from their contradictions. They retain the efficiency of blockchain transfers while maintaining the compliance interfaces of the real financial world. Because they are not fully decentralized assets, they are more acceptable to institutions, more suitable for payments, clearing, cross-border trade, and financial services.

But that also means they are not a pure “counter-sanction tool.”

They are more like an upgrade of the dollar system under new technological conditions. In the past, dollars moved through bank accounts and clearing systems; now they can circulate via stablecoins on public blockchains. Previously, influence was exerted through banks, clearinghouses, and SWIFT; now influence can be exerted through stablecoin issuers, centralized exchanges, on-chain analysis firms, and compliance providers. Technology makes the dollar move faster, wider, and cheaper, but it does not fundamentally alter the underlying power structure.

This is not just a typical sanctions story but a signal: global financial sanctions are entering the on-chain era.

In the past, the U.S. froze bank accounts; now it is freezing stablecoin addresses. Previously, sanctioned entities worried about losing access to dollar accounts; in the future, they will also worry about losing access to on-chain dollars.

This is the most important aspect of the U.S. freezing $344 million worth of Iranian crypto assets.