all i can say is that the attack on Mt.Gor exchange might be coming from the same person. this showcase the need for people to avoid abandoning their tokens on exchange. it is not advisable or favourable. get a wallet. whatever you earn from the exchange can be earn on the wallet.
No doubt it is the effort of a hacker always to target technologies especially the top trending or popular technologies. They love to achieve or extract the most precious data or information or you can say the precious currency of modern era which is the Bitcoin and other crypto currency. They will always be trying to hack or target the utmost profitable sources what we should do is to strengthen our security much more.
I agree with you that we should not relent on securing our account from time to time and one of the greatest we will ever make is to keep our fund on an exchange. No matter how good an exchange is, hackers are always very smart people and they are well trained for this.
They update themselves from time to time more than exchange security engineers themselves, and when it comes to coding in internet, there will always be loop holes from time to time which might not be seen easily. The best way to just safeguard our coin is to keep it safe in our wallet and also make sure our personal pc is safe guarded too because of malwares that could steal our system information.