G- why is buying and selling risky?

1. Shows a number of high-risk transactions in the account. Restricting bank card transactions for one day means that the amount transferred by yourself far exceeds your usual current amount. Beyond the judgment of the bank's big data on your own account, and after many times, the bank will think that your account is a risk account, and Alipay officials and the bank will jointly freeze that account for one day and prohibit trading.

It's not that there is something wrong with your account, but that you have made high-risk transactions many times. Under normal circumstances, you shouldn't do these transactions, but now you have done it many times, once or twice, and nobody cares, but if you have done such high-risk transactions many times, they think there may be something wrong with your account.

3. Because the bank will have such a bank card flow monitoring system, if it exceeds a certain limit, the source and destination of your funds will be audited.