This individual(s) is still only half way to Satoshi.
Centralized exchanges are a threat. For convenience (and perhaps out of ignorance) many find them helpful. Of course, when using fiat, it is the only way to get involved, at least at this time.
The hack just keep mounting. Over time, we are going to see more publicity related to security. What is wonderful about blockchain is they offer security since the data held is decentralized. I think we learned over the past 30 years that nothing centralized can truly protect data. Hacks take place all the time, with only the large ones getting the headlines.
What still makes me curious is the exchange said it will refund the money....who has $500M laying around?
How are they going to do this?