You made a huge profit trading cryptocurrencies, earning a full 10 million, and you happily thought about quickly converting these virtual currencies into real RMB.

So you started looking for those who could help you exchange USDT for RMB. After much searching, you finally found one that seemed quite reliable.

You agreed that you would transfer USDT to the exchange as collateral, and once the trader deposited the money into your account, you would confirm the transaction, and the exchange would release the coins to the trader. This sounded pretty safe, right? But actually, there is a big problem here—you have no way to determine if the money the trader gives you is clean!

You might think about checking the days the funds have been settled, or asking the trader to promise to freeze the card for reimbursement, or finding a well-established trader, which should be more reliable, right? But I'm sorry, none of that works! Because the freezing of cards is like a time bomb; when it explodes depends on when the victim reports it.

The root cause of the card freezing is simply that you don't know where the money from the trader comes from and whether it is clean. Even if there are no issues this time, a few months later, a previous transaction could be traced back and frozen due to involvement in a case. Not to mention that the trader's own bank card may be monitored by the bank's big data risk control due to frequent deposits and withdrawals, and the cards involved in transactions with the trader could also end up in trouble.

If the domestic bank card has too frequent fund inflows and outflows, or if it doesn't match previous transaction habits, or if it has quick in-and-out transactions without retention time, it may also trigger the bank's risk control and get directly frozen.

This matter, while simple to discuss, is really just that big data is too powerful. Those involved in online gambling often use USDT for transactions, buying and selling coins at exchanges with very frequent trades, which ends up linking their bank cards with those on the fraud blacklist, and being monitored by big data. Most traders' bank cards are also high-risk accounts, and if you deal with them frequently, your bank card could also be tagged as fraudulent by big data. Making money is a good thing, but you need to be careful when converting it to RMB!