Bittrex has reopened the Whitecoin [XWC] wallet on a post upgrade basis. Users that had an existing Whitecoin balance had their tokens swapped to the upgraded Whitecoin token. Users' Whitecoin (XWC) exchange balance totals will reflect the same total that they had prior to the swap in a 25:1 manner. Users who held a balance of less than 0.00000025 XWC were not eligible for the swap. The old Whitecoin is no longer supported on Bittrex. Further information: https://whitecoin.info/swap-guide