The perfect theft in crypto is claiming that a project or an exchange is hacked when its all an inside job, the reason why I think about this is I have never heard about other top exchanges helping a exchange that just got hacked to track their funds and get some back at least but if it's a sole hacker from outside they will track him or them down, why is that?.
when it real, between crypto exchanges must collaborate to track assets from exchanges hacked, so thief should has serious problem when they sold assets into another exchanges.so far alot big question about hacking case in exchanges, assets stolen never tracked and few of them caught up by police. as solid crypto ecosystem, each exchanges must support each other to track assets so will give protection to user itself.