"Has Haejin caused a stampede of demand with his fellow Korean traders? (j/k)"
I had to laugh at this comment. Wouldn't have even considered it, but with over > 22K followers, who knows how many of them are Koreans.
I see the risks you point out. I wonder if the volume means awareness is growing, even if concentrated in one country. But if they are just trading, then little value would be gained with the risk of a dump in the future. Steemit seems like a global phenomenon, so I'd expect volume to be diversified.