After earning 10 million USDT through cryptocurrency trading, many people will exchange for RMB through U merchants. The process often involves USDT transferring to the exchange's guarantee account → receiving RMB → confirming the release of funds, and it is common for funds to be idle for a long time, frozen cards to be compensated, and established U merchants to provide security, but these cannot avoid core risks.
The source of funds for U merchants is unclear and may involve gray industries.
Even if the transaction goes smoothly at the moment, if funds are linked to a case months later, the bank card may still be traced and frozen.
At the same time, U merchant accounts have been marked as high risk by banks' big data due to frequent large transactions, and personal cards transacting with them may be implicated; if personal accounts show frequent transfers, quick in-and-out operations, or other abnormal behaviors, this could trigger risk control and lead to freezing.
Essentially, gray industries often use USDT to circulate funds, and frequent transactions at exchanges can easily link personal cards to anti-fraud blacklists. Long-term trading with high-risk U merchants may also lead to being classified as a fraud-related account, resulting in funds being locked.
When exchanging cash, priority should be given to protecting the safety of bank cards, rather than pursuing speed or low transaction fees, as the money that can be freely controlled truly belongs to oneself.