Can coronavirus spreading be the cause?
No, crypto journalists just have this habit of explaining Bitcoin's price movements with some totally unrelated world events, because that's what generates traffic for their sites - no one wants to hear how Bitcoin is volatile and goes up or down as the result of pure speculation, because that's so boring.
Just think about it, why would the coronavirus impact bitcoin's price? It has no effect on how the bitcoin network works, or how people might use Bitcoin. And the effect on mining farms in China is still very small.
It's classic causation vs correlation, some people seem unable to see the difference between them, not sure if innocence or malice. I also don't think china's pull on bitcoin is that strong that coronavirus would mean bitcoin's doom or whatever. It could be that some users are just selling off their savings to be able to afford care / preventive measures.