At this time, Bittrex is not supporting the XYM airdrop to NEM (XEM) holders scheduled to occur in March 2021.
To review our policy on forks, airdrops and promos go to:
https://bittrex.zendesk.com/hc/en-us/articles/115001919932-Claims-Stakes-Promotions-Giveaways-and-Airdrops
Further information:
https://nemplatform.com/symbol-migration/