I don't know much about the inner workings of bitcoin, but they know what wallet the stolen coins went into and where they went from there. Is it impossible to black-list the tainted coins/wallets? If every single transaction is in a ledger, then wouldn't every single coin be traceable?
Yep stick to your day job, blockchain aint for you son!!
Instead of making useless comments, perhaps you could explain why the system cannot be used to track the stolen coin? It seems that users were quite successful in watching where it went from the nicehash wallet.
Someone able to steal this much of coins will have knowledge how to launder the coins untraceable. There are several darknet launder places where coins get mixed so none is able to say whos has which coin. Also few swaps to altcoins like Monero and ZEC with hidden transactions the output is fresh altcoins which can be traded to fresh BTC and none knows which has which "stolen" Bitcoin. Maybe all bitcoins are traceable but whith some major mixing none knows who holds which coin.
Cryptonight is for CPUs and Vega.