A dev "SonnyDaytona" visited Cryptopia exchange office and was satisfied with their progress. It is no hacking problem or anything else. It is just an event that made them repair / rebuild the Signatum wallet. It is an ongoing build as I write. Will take maybe few more days. The good thing about this is, all your coins are safe with them and you can withdraw / trade once the wallet is online again at Cryptopia.
Even child doesn't believe in such explanation. "An event"... Someone makes big money here since "an event"... Just another unreliable exchange in crypto world.