You'll need way more hash power for that. Remember if you have 51% hash power, you'll be able to do the 51% attack roughly half of the time.
To rollback the Bitcoin chain, you'll probably need 90-95% of the hashing rate to eclipse all other miners. That requires that the other 50% becomes 5%; or in other words you multiply your hash rate by 10. Which is not even remotely possible.
To rollback the Bitcoin chain, you'll probably need 90-95% of the hashing rate to eclipse all other miners. That requires that the other 50% becomes 5%; or in other words you multiply your hash rate by 10. Which is not even remotely possible.