this is a warning !!!
Top 10 big exchanges is the next target hackers !!!
good luck, and be careful 
If you are the culprit, then you have made a big mistake for the crypto community.
How did you know that the top big exchanges will be the next target of scammers? Is there any proof?
I think big exchanges is not that easy to compromised by hackers. Big exchanges have tight security by having 2fa, like email and sms verification which is not easy for hackers to take.
2Fa and email verification are not enough to secure the website, because the hacker entered the database system. Yes, I think in this case the admin is very important. They have to deactivate the website, or do maintenance immediately.