My ETH funds were stolen and I am sure I didn't give out or handled carelessly the Mnemonic phrase, JSON file, private key nor the key store. Please I want to know ways by which a cryptocurrency wallet could be hacked.
Cryptocurrency wallets can only be hacked when the private keys are compromised, so the best thing to do to make sure you keep your private key information well secured.
I really agree with what you conveyed, because some time ago when the ramped up wallet was being hacked it was because the account holder was wrong when opening a wallet website that was indeed fake, so that the existing assets could be stolen.
like for example the fake MEW that was troubling at the beginning of the year which was similar to the real one.