51 Percent Attack is an attack on blockchain that dominates 51 percent of its overall computation rate (hash rate). Assuming the current Bitcoin blockchain hash rate is 126.13 Exahash per day, then 51 Percent Attack should be able to dominate up to 64.3263 Exahash per day.
In this case, the Bitcoin miners have the potential to carry out the attack, because they are the ones who have the greatest resources. The fact is that currently, the Bitcoin mining hash rate globally is controlled by miners from China which reaches 2/3 or around 66.66 percent. This means Bitcoin miners from China, if they want, they can do a 51 Percent Attack on the Bitcoin blockchain.
If you ask why they don't want to attack, the answer is simple, because it will mess with the Bitcoin ecosystem itself, including the crypto asset ecosystem in general. There will be distrust of Bitcoin, which in turn reduces the value and degree of Bitcoin itself. However, the chances of success at 51 Percent Attack are also uncertain. This means that considering the enormous cost per day, then the likelihood of confusion and uncertainty, hackers have to think a thousand times.
See what I understand is :
The miners are actually the people who are dependent on Bitcoins for their regular income and such .
What would they get out of this?-Nothing
The only thing we should be worried about is the fact that the government can seize the Mining farms and with the help of their unfair power and can shut down the percentage located in China and therefore make the Bitcoins vulnerable.
BUT
If something like this happens , people will be informed on time and you can just stop your transactions entirely , rather you can make a transaction in ATH and convert it into BTC this way there won't be any prolems regarding the unsecured transactions.
Plus even if this happens it might take a while but the remaining miners would for sure see this as an opportunity to dominate the market and increase their work load , within months it would be stronger than ever , which would essentially prevent the future problems related to China.
_*_