Read more at: https://dowbit.com/south-korea-will-impose-bitcoin-tax/
This is the government which has the desire to take some part of the action and technically there is nothing wrong with it. Just like the US, am sure that South Korea also wants to boost their revenue collection and Bitcoin is an opportunity to do it as more and more South Koreans are getting into the Bitcoin club. Now, the implication with this is that when you taxed something you are recognizing its status and this in effect can mean legalization...obviously it would be hard for the government to be taxing something it still categorized as illegal. And we all prefer to pay taxes rather than be banned from buying and selling Bitcoin.