When a crypto exchange gets hacked, it is most likely to lose out a lot of funds, or worse, go bankrupt. Right? This is what we have seen so far in all the cases that we have delved into.

But here is a unicorn that defied all possible consequences of a successful hack attempt. PolyNetwork was targeted by a group of hackers, in what could have been one of the greatest crypto heists of all time, even surpassing Mt. Gox. The hacker was able to exploit a major vulnerability in the code of Poly Networks, which allowed them to transfer all the funds to his accounts.

The hack allowed the hacker to steal nearly $600 million worth of cryptocurrency. Then, a strange thing happened. The hacker started a dialogue with Poly Network, promising to return the stolen funds. The company understandably pleaded with the hacker to return all the funds and while he did so, a final installment of $200 million in funds was still frozen and required the hacker's private key. According to recent reports, the private keys were also shared, leading to the complete recovery of the stolen funds.