The transparency is the feature that makes it great. I can buy drugs or whatever, and exchange you buy an NFT from me of equal value. Now when the bank comes and says “where did this >$15k transaction come from?” I can point to the blockchain and say that I sold my fancy monkey pic.
This has been a thing in the physical art world for a while, https://complyadvantage.com/insights/art-money-laundering/, this just made it easier.