https://support.bittrex.com/hc/en-us/articles/360000560871
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2.2. Restricted Locations
You may not use the Services if you are located in, or a citizen or resident of any state, country, territory or other jurisdiction that is embargoed by the United States or where your use of the Services would be illegal or otherwise violate any applicable law.
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Does this mean that Russian citizens will not be able to use this exchange? After all, the United States imposed sanctions against Russia
P.S >> And aslo there is one impotant moment: now bittrex has the right to request any information about users who refuse to provide will be banned. So it was before, but now they are talking about it directly
Your concerns are justified. Given the madness of the cold war against Russia, I would not be surprised if they force Bittrex to play their dirty little games. I recommend:
1. You move any tokens stored at Bittrex away from the exchange.
2. After moving your tokens away (if applicable), it would be best to contact Bittrex support and ask them directly for clarification.
I hope the above helps. Good luck my friend.