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......
I think when Bitcoin drops to $ 4000 a lot of investors who have Fiat will experience a profit.
because with such a price will be easy to be bought by people who have Fiat a lot.
and can manipulate the market, even when fiat investors profit then they can create a new Exchange.