Hello, so apparently on or around January 2018, NewYorkCoin had a market capital of around $120,000,000. However, according to the NYC blockchain, a 51% attack was successfully carried out. This event took place around October 2018. The attack was performed by sending slightly less than 1 billion NYC coins from an NYC address without any input addresses, by using the destination address as the input. This is normally rejected by the wallets as an invalid transaction, however, the attacker modified his mining wallet to accept it as a valid transaction. The attacker then mined the blocks to verify it on the blockchain, because the attacker had more than 51% of the hashing power, and the longest chain is always considered the real one. The attacker then used these funds to tank the market, taking around $500,000 usd and collapsing the market. The attacker sold around 32 billion NYC.