Honestly I see a "rock and roll" sign on that chart. 
Anyway South Koreans does really have high interest to cryptocurrencies. An exchange won't operate there if there's no interest and volume at all. And this ain't new as far as I remember there are also hack incidents that included that South Korean-based exchange (bithumb).
Addition:
To know more about the volume of different countries: https://coin.dance/volume/localbitcoins
Thank you very much, very interesting information on the resource, I will add to myself.Anyway South Koreans does really have high interest to cryptocurrencies. An exchange won't operate there if there's no interest and volume at all. And this ain't new as far as I remember there are also hack incidents that included that South Korean-based exchange (bithumb).
Addition:
To know more about the volume of different countries: https://coin.dance/volume/localbitcoins
Let's see what this brings, the Korean market definitely looks more positive then other markets.
South Korean market has been always good. You will never expect that there's a good movement of crypto's there and mostly for bitcoin. This is like Japan crypto community where there's a massive support from the people though I'm not sure what's the current talks about the government there. You may never know on how big the South Korean market and let's say that North Korea is already there as I've read some news regarding its interest to bitocin mining.