Withdrawing digital currency to a bank card can easily lead to card freezing for the following reasons:

1. 📌 Legitimacy of transactions:

- Suspected illegal activities: Digital currencies are often used for money laundering, fraud, gambling, and other illegal activities. If the source of a user's digital currency is illegal or if the transaction is associated with illegal activities, the bank may freeze the related bank card after detecting abnormal fund flows to assist in investigations or to prevent further illegal use of the funds.

2. 📌 Characteristics of digital currency transactions:

- Anonymity of transactions and difficulty of regulation: Digital currency transactions have a certain level of anonymity, making it difficult to trace the source and destination of funds. Banks find it challenging to accurately determine the authenticity and legality of transactions; to avoid risks, they may tighten scrutiny on withdrawal transactions involving digital currencies, and if any doubts arise, they may freeze the card.

- Price volatility and abnormal transactions: Digital currency prices are highly volatile, which can trigger abnormal trading behaviors. For instance, large amounts of funds being transferred in and out within a short period, associated with significant fluctuations in the digital currency market, may activate the bank's risk monitoring mechanism, leading to the freezing of the bank card.

3. 📌 Policies, regulations, and regulatory requirements:

- Incomplete laws and regulations: Currently, the laws and regulations in the digital currency field are not well established, and banks lack clear guidelines when handling related businesses. To avoid legal risks, they adopt a cautious attitude towards digital currency withdrawals to bank cards, and any unusual situations may lead to card freezing.

- Strengthened regulatory efforts: With the increasing regulation of digital currencies, banks face greater compliance pressure and must strictly implement regulatory requirements, enhancing the monitoring and control of digital currency-related transactions. This makes bank cards involved in digital currency withdrawals more likely to be frozen due to regulatory requirements.