I'm sorry, but you can't really be saying that you consider bitcoin to be a safer place to park your money than US Treasuries?
In any case, Koreans can access safe haven assets from around the globe; they don't need bitcoin for that.
In fact, I wouldn't be surprised if, after the rage of a shakeout, bitcoin were at some point banned in South Korea. Online gambling is banned (there are public service announcement ads in the subway against it, showing gamble-a-holics in handcuffs). They might just have to classify bitcoin as gambling. Once there is a large enough group of people angry at losing their money to bitcoin mania, it could happen.