William · Blockchain Analytics and Research
Posted 3 weeks ago
We have confirmed the recent token outflow from Bittrex is due to the termination of orderbook partnership between Bittrex and Upbit. Upbit's funds previously held in Bittrex wallet have been moved to Upbit's new wallets. The new wallets will be updated and reflected in our system soon.

https://themerkle.com/upbit-confirms-its-partnership-with-bittrex-will-end-next-month/