A report published by Chainalysis has detailed the prolific wash trading going on in the NFT marketplace. The 262 sellers that were selling their NFT collections to themselves engaged in the practice a minimum of 25 times. After artificially increasing the value of the collections, the sellers profited more than US$8 million by later selling the NFTs to unsuspecting buyers.
https://www.notebookcheck.net/Scathing-report-finds-people-profited-immensely-by-selling-themselves-their-NFT-collections-to-artificially-increase-the-value.597780.0.html