According to some sources, Binance was hacked just to hide the sale bitcoin of the Japanese (mt.gox) ( ~800k BTC ). If there are more information about the hacking exchange.Then, BTC breaking below 4xxx, maybe 2k5, I think the best way : u should to sell all your BTC, altcoin. All exchange will die. Thats' the second mt.gox. ***Attention from now until 7/4/2018.
The Chinese exchange is not easy to hack. If so, it is deliberate......
Yes of course everything is possible in this thing because the price are just depending on the demands of the people so if there are a scenario that almost all the people around the world sells their bitcoins and the bitcoins falls too much the price will totally crash and then the remaining people panic sell tpo and that will just make it worst and the bitcoins will be lower than $4,000. But in this period of time i know that it will not happen just spread the news of holding and not panicking because that prevents the people from selling and the bitcoins from falling.