What makes you think that Koreans don't care about BOScoin? Most BOScoin investors are located in Korea actually, and the Korean media channels are pretty active.
Maybe you are right, but I refer the price, the price doesn't look good or awesome like the other Korean project ICON. This is weird. And no market cap on CMC list.
Well for starters BOS started trading when the market was in a bearish trend. There have also been a few delays and we are currently waiting for the TestNet and MainNet to be launched. Although the roadmap with milestones is defined and development is ongoing, people might be waiting for the next milestones before investing (more).
The team has contacted CoinMarketCap to fix the circulating supply in order to have the market cap calculated. They have provided the necessary details and are waiting for CoinMarketCap to update their information, which hopefully won't take too long.