Tradesatoshi have announced today (7 July) that they are delisting Nyan on 15 July 2019 - only one week from now.
https://tradesatoshi.com/News/379/NYAN-Delisting

Please go there NOW and cancel any orders, then withdraw all Nyan to another exchange, paper wallet or the software wallet.

In case you didn't read that - you have 7 DAYS in which to withdraw all Nyan from that exchange.  Don't delay, withdraw today.