The pass phrase or extended words adds an additional later of security to your wallet making it difficult for hackers to login directly to your main wallets. You should know that this can only be done upon creation of a new wallet. You can't extend your seed phrase after the Wallet has already been created that because all the addresses and private keys will be unique to that seed phrase.


I don't think that's fisible. By just copying your wallet file the hacker would still need to input your seedphrase to access your wallet. So always make sure to store your keys offline and not in your computer even if it's a cold storage..