Holy 157 million that's a huge amount. There is no way to freeze an address on ethereum, right? Because if they don't then there could be a massive blood bath on the alt market.
It will take time before themy manage to sell it all. I don't believe they'll just dump it like that but rather go through a number of altcoins to make it harder to trace.
Also many of those centralized coins can be stopped. Like he stole 20 million in USDt which is a balloon coin. They can choose to redeem it or not. Many of those ERC220 shitcoins are like IOU slips. He can get something or nothing.