I don't think DeepSeek has a direct relationship with the decline in crypto markets, but as the article mentioned, the main reason is the feeling of fear, as the decline in the stock markets and major American stocks led to a state of fear and anxiety that was reflected in all markets, including crypto, of course.
It is true that China is trying to invade all fields, but what distinguishes the Chinese industry in general is that it is cheap, so it is possible for us as users to benefit from these positive features and ignore the negative features.