And what's happened in China?
Chinese miners are moving to Canada and Europe and are being welcomed with open arms. China will lose money on this but it's their choice. They won't take the offer so somebody else will.
There won't be an overload caused by a ban in Korea, even if they eventually ban it in a year or 2. Koreans aren't running a mining powerhouse as opposed to the Chinese and if China hasn't banned mining yet I doubt that Korea will. The effect of a ban would be Korea losing money on it, Koreans moving exchanges and money abroad, miners moving their farms, that's it.