Wash trading
Sellers trade an NFT between their own wallets to inflate volume and price, creating a false impression of demand before selling to a real buyer.
Fake floors and bots
Bots list and delist to fake a floor price, and fake collections copy popular art to trick buyers into the wrong contract.
Protecting yourself
Verify the official contract address, check real holder and sales history, and be skeptical of sudden volume spikes. Buy only from links you reached through official channels.