RE: Upbit in Trouble?

I wonder which CEX will benefit in case of Upbit's closure.

I don't know what will Koreans prefer. Binance is a top player, but maybe they will prefer a local player.

How about the pump and dump of HIVE coming from Upbit? Will it stop?

Not sure. Maybe. Or maybe they'll find another place from where to do it. The liquidity will still be there to be used... somewhere.

If HIVE is no longer accessible for South Koreans, what will be its impact on HIVE's price?

HIVE continues to be accessible to South Koreans. For Upbit, unless they go bankrupt, existing users are unaffected. As for new users within 6 months when Upbit may be under restrictions to have new users, there are other exchanges with Hive listings available in SK (Binance, for example).