Wallet hacking is possible to happen, and this is why we need to secure the wallet from any attack that might comes. We need to save the private keys to the save place so we can reduce the attacker to compromise with the wallet. And if you use the wallet for the android phone, you need to be careful to use your wallet and don't let other people know your wallet inside your android phone. There are many more ways that you need to do to secure your wallet and make sure your wallet is safe.