If a wallet is protected with a passphrase, it is not possible for someone to spend money in that wallet without knowing the passphrase.
This is arguably the most vital function of a wallet and any established wallet will implement this protection well.
Deleting local blockchain data accumulated by a wallet application has no effect on this aspect of wallet security.
Offering compensation likely leads to a deluge of tempting offers from thieves pretending to be recovery agents. I think it safest to assume they are all fake.









