You should be far more concerned about how much you know about Bitcoin and how safely you behave. It is so much more probable that you make a mistake that will result in the loss of your Bitcoins then a technical issue.

Yes, I know that. There was even a little talk about the subject. https://bt.irlbtc.com/view/1738678

But is it possible that the protocol I am wondering about is hacking itself?

You the whole blockchain i never heard that bitcoin was hack the whole blockchain but i heard that there are some traders before was hack and every years its happening but do not worry many people are supporting bitcoin if the price will going down due to the trading site was crash.. and bitcoin will be safe if you are saving your bitcoin in the good place..  and you increase your security 2 factor auth.

Yes exactly these protocols were great because its has a stealth character which cannot be hacked. Most of those problems like stolen funds were on their personal online wallet leaked with other users who became untrusted who betray their coleagues and get funds from them. Bitcoin itself is safe because its a digital form and it only became fear ot theat due to fiat cash convertion.

It's safe enough such that I completely trust the protocol.  It's been adopted by the geekiest geeks you can imagine, and the CIA and all the other spy agencies know about it, and it's resisted hacking thus far.  So yeah, the real danger comes not from bitcoin itself, but the scumfucs who make up the community.  And said community is rife with thievery.

August 15, 2010
https://bt.irlbtc.com/view/822.0
https://bt.irlbtc.com/view/823.0

Bitcoin is 100% if the owner take good care of his bitcoin. Aside from DDOS attack. Third party like exchangers that are vulnerable from hackers attacks could possibly loss your bitcoin. Also online wallets like blockchain.info and coinbase wallet is also not really safe to use. Better use electrum or mycelium wallet.

If you wondering whether or not bitcoin itself is a hacking tool or core wallet being some kind of trojan? some might say mining is a secret alien agenda trying to manipulate and control human's life in the future but it's all fiction and speculations. For someone to attack the network, they would need the most hashrate(computing power) and after the attack they will need to constantly compete with others to maintain their superiority but why would some one go all the way to reach a high level of computing power and have the upper hand wants to hurt the system since they can profit the most out of it if the system stays successful?

Any change or attempting to change anything in the source code requires consensus from many known developers and only after all voted then they can have access to it in github the open source community.

bitcoin is the safest currency in the world, no central office, no central database.
but its depending of our system too, our security too.
if we can't save our bitcoin at safe place, its easy to lost our bitcoin too.
its like we have bank at our wallet.