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With a market capitalization of around $186 billion, USDT has become the digital dollar for millions of people. But behind the convenience lies a fundamental risk: the issuer can freeze funds at any address at any time—and it actively does so.

In the last six months alone, Tether has blacklisted 2,362 addresses on the Ethereum and TRON networks, blocking $1.64 billion on them. This usually involves hackers and scammers, but the very possibility of freezing means that even on a non-custodial wallet, you do not fully control your tokens.

How the freezing mechanism works

The ability to block an address and forcibly destroy tokens is built into Tether's smart contracts. The functions have different names, but the essence is the same:

• addBlackList — the address owner loses the ability to send USDT, although the address continues to receive new tokens;
• removeBlackList — restores the ability to transfer;
• destroyBlackFunds — irreversibly burns USDT at the blocked address. They cannot be recovered.

After burning, Tether can issue an equivalent volume of tokens at another address. The issuer can take dollars from one address and reissue them in favor of another. According to analysts, it takes an average of about two days between issuing a freeze order and its execution on the network.

Promissory note vs. digital gold

Behind each freeze is an external request. Tether freezes an address based on a single verified request from law enforcement—without warning to the holder and without an appeals process. The T3 Financial Crime Unit (T3 FCU), established in September 2024, had frozen over $450 million across 23 jurisdictions by May 2026.

Stablecoins themselves are found for freezing by on-chain analytics companies like Chainalysis and TRM Labs. They assign risk levels to wallets and link them together. If an address receives a high risk score, AML systems also raise the score for wallets associated with it. Sometimes, random users whose coins once passed through a recognized "dirty" address fall under restrictions.

USDT and USDC are debt obligations of a centralized issuer. It retains control at the contract level: blocks transfers, burns balances, reissues amounts. Bitcoin has no administrator, no blacklist function, and no "big red button" called destroyBlackFunds. There is simply no one to execute such a request.

Conclusion: Bitcoin as the only alternative

The freeze function helps investigate crimes and return funds to victims. But this system has a downside. USDT remains a centralized asset, and access to funds depends on the issuer's decisions and government requests. Essentially, the stablecoin has become a node in a global surveillance system.

Bitcoin protects against arbitrary freezing but does not hide financial activity. All transactions are recorded in a public ledger and can be analyzed years later. Reducing the digital footprint requires additional tools—for example, privacy-enhancing solutions.

My professional opinion: diversifying among major stablecoins only dilutes dependence on one company but does not change the freeze architecture. Bitcoin remains the only major digital asset that does not depend on decisions by an issuer, regulator, or bank. It cannot be frozen, seized, or burned by a third party's decision, and its issuance rules remain unchanged regardless of states' inflationary policies.