i have no idea what this word means or where you are taking it from but "bitcoin" itself is not hack-able. the way private keys are (a random number in an unbelievably huge range), and how the hashing to get the public keys and bitcoin address (ECDSA and SHA256 which are irreversible) makes it un-hack-able!

your wallet is hack-able though. if you are not careful, use a weak password or have a compromised machine that you use for your wallet.

ps. more than 8 years of being around and not being hacked even once should answer your question though!