Parity was one of the best ethereum wallets in the past but that all changed when their wallet was exploited and accounts with multi-sig addresses got attacked losing thousands - millions. With all the security breach going around, we have to stop patronize centralized cryptocurrency service provider. eg: Exchanges, Wallets.
Much thanks. I did neither know nor use Parity wallet and I did not know about Parity wallet hack. I found this article that was written to discuss about the Parity wallet hack.
That hack was abused by bad smart contract.
According to crypto eli5, 151 wallets have been frozen, with their balances being 513,743 ETH or $152 million in total. Parity Technologies announce that 573 wallets have been affected and their total balance is unknown.
https://cointelegraph.com/news/parity-multisig-wallet-hacked-or-how-come