A bug in the OpenSea NFT marketplace allowed hackers to buy rare NFTs from owners for much lesser market value and resell them for hefty profits. Three attackers stole over $1 million by exploiting a bug in the marketplace. One of the alleged opportunists bought a Mutant Ape Yacht Club NFT for $10,600 worth of Ether, before selling it for $34,800 worth of Ether.