how much would a 51 attack on btc cost 
if a large mining pool was directed by its managers to conduct an attack it wouldn t cost the managers much at the time of the attack however it would likely lose its honest miners once they found out about it for a single person or group to conduct a 51 attack they would need more than 304 eh s of computing power this is an enormous cost considering the fastest miner hashes 406 th s and costs more than 10 000 per unit about 84 000 units the bottom linea 51 attack is the unlikely event that a group will acquire more than 50 of the hashing power of a cryptocurrency network these attacks happen on smaller crypto networks but tend to fail on larger ones like bitcoin because they are more secure the comments opinions and analyses expressed on investopedia are for informational purposes online read our warranty and liability disclaimer for more info 