$BNB What happened, why is BNB plummeting?

From the peak of 1375 to now 699, it’s about to be cut in half, can we look back a year ago? (over 500)

A couple of days ago, Binance bought BTC, I don’t know if it will save BNB, after all, it’s their own child. Looking at those big red bars, would you dare to short it at this position?

BNB
BNB
598.98
-2.84%