Bithumb is the largest cryptocurrency exchange in South Korea and it has been hacked for second time
for a huge number of EOS and XRP. It was hacked last year also when 30$ million worth crypto was stolen.
This is why we should not hodl our coins on exchanges as there is no week that some of them is not hacked.
DragonEx Exchange got hacked a few days ago as well.
Well, it seems no improvement in their security has been taken out, the hackers had a much better skill than their security officers, people will think it's an inside job, like what happens to Cryptopia, why can't these exchange like Kucoin or BInance, they are well secured.