It's like the norm for the current ecosystem nowadays. Exchanges will be hacked every now and then and then there will be quite an effect in the market for a little while and then it will just shrug it off. Bithumb is the largest South Korean exchanges IIRC and also one of the exchanges to hit $20k during the bull run, so it's a shame still that they got 'hacked' despite being known for their intelligence regarding cybersec and datasec (SoKor in general). Surprisingly though, not much fuzz was made about the hack this time, and it looks like a typical Wednesday for traders since there seems to be not much effect on the markets for now.
Yeah and even though btc dipped, it isn't that significant compared to other times when major exchanges get hacked. I'm just a little confused why such a big exchange like bithumb can't up their security. I mean you compromise people's money here if you lack off in it right