1,000,000,000 Won = $875,853.23 = ~330
BTCthis is not even in the top 20 exchange hacks in the history of bitcoin

this is more like the amount that some whales lose if they have a bad trading day...
My initial reaction in seeing the word billions in the title was "wtf!?". Upon clicking the topic, it is not even 1/2 of the largest hacks in Bitcoin or all of crypto for the matter. The hacker can dump all coins in the market anytime, no problem.

It is a clickbait title. Moving on.