I found a few articles from local newspapers but you may need google translation though - I don't ;) Or alternatively, see the English article that also discusses the same source under the section 'Bank of Korea’s Crypto Report' (see links below). By the way, I don't think the BOK report itself can be interpreted as too bullish to be honest - it is still trying to play down the significance of crypto: "...It is not easy for cryptocurrency to have broad acceptance in the short term and it is less competitive than traditional means of payment such as cash or credit cards. In other words, it is difficult to become a medium of exchange...".

https://news.bitcoin.com/korean-regulations-policy-easing-crypto-classification-central-bank-report/

http://www.fntoday.co.kr/news/articleView.html?idxno=165324 (Korean)

http://www.businesspost.co.kr/BP?command=article_view&num=88072 (Korean)