So in China, no matter how many Us you have, it’s basically impossible to use them, so what about the ETF that was set up in Hong Kong before?

Is trading cryptocurrencies illegal? No wonder East Asia's current AI, artificial intelligence, chip hardware, etc., have been left far behind by the United States. There is almost no room for improvement.
Now that people are not allowed to trade cryptocurrencies, does that mean they will trade A stocks, which will definitely lead to losses and being exploited by others? $BTC