I've been thinking similar things. Not specifically to Korean banks, but I am pretty sure large parties are buying up crypto and manipulating prices. I've witnessed this behaviour first hand from closeby in smaller markets... and if it happens there, I have no reason to think it is not happening with Bitcoin.
The race to buy crypto has begun a while ago, I think. The gold-fever/cryptofever is about to go mainstream in a short time.
Gave you an upvote and follow! Saw you resteemed my omisego article from a while ago, thanks so much! :)
RE: Bank of Korea is taking over Bitcoin Cash?