system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: how exactly does Art help launder money?

So if I have a million dollars cash lying around. I ask any artist to paint me a painting and I pay him a million dollars. However, wouldn’t the IRS just ask where I got the money to pay for this? Also, wouldn’t the artist himself need to launder all that cash somehow?
gpt
Any time you can move cash around in random amounts without explanation it's good for money laundering. Selling art is the best example of moving money from one person to another person in amounts that don't need to be explained to anyone. Why did this guy give you 10 million dollars for a crappy painting? He just felt like it? Ok. Why did you give that guy 2 million dollars for a crappy painting? You just felt like it? Ok. It's all subjective, so no one can accuse you of "overpaying" for anything. Just move the money in whatever amount you need to, and say that you felt like that was a reasonable amount.

You can't do that with things that have established values and prices, because it's immediately suspicious why you would overpay so vastly for an item that has a clearly defined value and can be bought anywhere for X amount.