Is 51% attack on bitcoin just a myth or reality

[De Gramor]

While learning about bitcoin I came across somethings that are a bit challenging for me, so I thought of asking it here on the forum, I don’t know if I am mixing things up, if I am I will like you to correct me. So according to my readings it states In the history of bitcoin, we are fully aware that the blocks of the blockchain can be replaced by any miner with the support of high supply of mining power, which the acts is called 51% attack.
   To be more clear, the acts is just like rewriting a block of transactions under a blockchain and creating new transactions history, which is very difficult to achieve because the Mining works rates doubled, but it says to be achievable.
So I have been wondering at any point in history of bitcoin has any miner or group of miners  ever successfully achieved this goal, or have any one come closer in achieving it?

[Ruttoshi]

Nobody has achieved it which was the main reason why Satoshi provided an incentive for any miner that's able to mine a new block so that they don't think of 51% attack but rather compete for their block reward.

It's impossible for a miner or mining pool to control more than 50% of the mining hash rate because the money to be spent on that is very expensive and the no one would want to do that because the cost is far higher than the benefits. To have a bigger hash rate than all the current collective hash rate of bitcoin network is not easy and a waste of time and money. This is why the network is secured and cannot be controlled by anyone

[Karl_3000]

So I have been wondering at any point in history of bitcoin has any miner or group of miners  ever successfully achieved this goal, or have any one come closer in achieving it?

It has not been achieved before.

Nobody has achieved it which was the main reason why Satoshi provided an incentive for any miner that's able to mine a new block so that they don't think of 51% attack but rather compete for their block reward.

Some blockchains having mining reward but suffered 51% attack in the past.

It's impossible for a miner or mining pool to control more than 50% of the mining hash rate because the money to be spent on that is very expensive and the no one would want to do that because the cost is far higher than the benefits. To have a bigger hash rate than all the current collective hash rate of bitcoin network is not easy and a waste of time and money. This is why the network is secured and cannot be controlled by anyone

The main reason 51% attack is not possible is because miners can not disrupt where they are seeing money. Any miner that will attempt that will be external but no external miner that will have that huge amount of hash rate.

[LayerzWallet]

its a theoretical nothing burger as currently the economic incentive simply isn't there

[De Gramor]

I see positive comments under my post but I am not convinced or even satisfy with the replies. I do not know but I have haven’t gotten the clarification and explanation I want I guess I will be moving this topic to the main technical board so I will get more explanation and the answers I deserved. Thanks for the replies I’m very great full.

[WhoYouCantKill]

Nice question. For the lon time, there has been no one who has carried out 51% attack on Bitcoin successfully. Though this is possible theory wise, the size of the network and the massive amount of power computing needed made it almost impossible to practice. Certain smaller blockchains has really suffered 51% attacks, but the security of Bitcoin and it's decentralized mining network have left it in safe state from such happenings.

[mustapha67]

Sincerely, I was wondering about the truth, or reality of Bitcoin. Somehow, I am yet to justify whether, Bitcoin is a myth or reality. However, be it abstract or concrete oriented programme, it should be considered real. God made several things, there are those visible, and those invisible. The about it that all things are real.

The fact that the internet seems abstract does not possibly make everything in the internet unreal. My point in this case is clear, though I was thinking about it similar, but after a deep investigation, I have resolved that Bitcoin a commercial, tangible, and reliable forum for people to acquaint themselves with business.

Moreover, talking about myth or reality, how real is a government of a nation..? Who has ever seen a government agency? A president, or governor is government, likewise the citizens... Leadership is not concrete, only the people in leadership are. Wisdom is abstract, yet reflects on humans either negatively or positively.