Centralized Exchanges will always be very attractive to attack, because they hold huge amounts of BTC and other coins.
Having centralized third parties is against the idea of Bitcoin and other crypto currencies. I'm sorry for people who lost their money - but they new the risk after so many hacks: MtGox, Bitstamp and many others.
Don't have your coins longer than necessary on centralized exchanges. Statistically there are 5 bugs every 1000 lines of code - if it is well written!
There are solutions, .. just search for "decentralized bitcoin exchange".