A lot of people buy art not because they like looking at it, but because they want everyone to know that they have lots of money to drop on worthless art purchases. This motivation is reinforced if a.) everybody knows how much money they're dropping on art purchases and b.) the price keeps going up, yet they still win the bid. They want the price to go up, since a higher price just signifies how baller they are.
You get the same veblen bragging rights, the artist (assuming they are not simply your own alter ego) gets a visibility boost and nobody is going to be motivated enough to go digging around the custody trail to prove this was a sham.
This sleight of hand (in a slightly modified form) is standard operating procedure for inflating the value of ICO offerings (and by extension, crypto as a whole); I don't see why people wouldn't do it for NFTs, with the same motivations at work.
They've succeeded in demonstrating their wealth, but no one has any idea who they are, which seems to poke a hole in that theory.
I'm part of a community that's currently being overtaken by the crypto art craze, and I'm still convinced it's "all for a quick buck".
The crypto art economy seems to be driven by "collectors" who will drop thousands of dollars on anyone who can get them more exposure. People who have no followers and aren't tweeting about NFTs every day generally don't get their art bought. Some of these kids who made $10,000 off a png then feel some social pressure to put some of that money back into the community, so they purchase more crypto art with the proceeds.
Some collectors openly advertise their ongoing bids on social media. They want people to see that they're dropping big money on art. If it was a true art collector, wouldn't they not want to be outbid? Wouldn't they be hoping that there were as few people in the auction as possible? None of it smells right to me.