An attack of 51% is a major security threat to cryptocurrency, because it allows criminals to control the network of a cryptocurrency and all transactions that pass through it. There are already several examples of 51% attacks on crypto among them: Litecoin Cash, ZenCash, AurumCoin, Ethereum Classic, Coiledcoin, Krypton, Electroneum, Bitcoin Gold, Bitcoin Gold, Bitcoin Gold, Monacoin, Verge. Many people in the crypto currency community think the attack on Bitcoin is just a matter of time. So what do you think about Bitcoin getting 51% attacks?