China's laws do not list foreign exchange speculation as an illegal act, and individuals' participation in foreign exchange transactions is not explicitly prohibited, so it is legal to speculate in foreign exchange in China.

In foreign countries, it is also legal to speculate in foreign exchange. Regulators similar to the China Securities Regulatory Commission also exist abroad, such as the Futures Association of the United States and the Financial Supervisory Authority of the United Kingdom. They supervise foreign exchange platforms to ensure their safety and legitimacy.

Therefore, as a domestic investor, you can participate in foreign exchange transactions, but you must choose a standardized foreign exchange platform.