Yeah, hacks of centralized exchanges happen from time to time. These systems are really vulnerable as fraudsters are constantly improving their strategies. Also, exchanges don’t have enough protection from attacks because they are based on central systems. There are a few exchanges which were never hacked like CEX (you can buy and store crypto there using their cold storage,
https://cex.io/buy-bitcoins) or Kraken. But I think that centralized exchanges are outdated. It’s time to launch simple and reliable decentralized alternatives which wouldn't store users’ funds. What you think about DEXs and their potential?