The exchange hack was 3 days ago but bitcoin price has not been affected till now. We are not in the days of Mt. Gox exchange again that a single exchange has 70% of the total bitcoin. We have hundreds of exchanges now and such news is not affecting the crypto market anymore.

Although the main reason is that the is not a common a exchange like Binance. But if Binance or a very common exchange is hacked, the effect would be almost insignificant also. Bitcoin will drop just little in price and increase again.