This has happened around 4 times since Hive started. The Korean exchanges seem to be the ones with the most volume during these pumps. I don't know why that group would be buying, and if they are holding or just hoping to cause the pump, get in early then get out at the top before the dump. But the rest of us can possibly sell some Hive high and buy it back lower. I don't advise that because it's very risky. Actually I don't advise anything because I am not a financial advisor!