So I had to read some Marx for one of my French classes. Something he says is that objects don't have value on their own, they only get value during the act of exchanging them. Something may be useful, or have utilitarian value, and that is the thing that motivates you to exchange them, but the usefulness of the object has nothing to do with the value that humans assign to the object.
He also says that people can't have value, only objects can. People can have objects that have value, and that makes them rich.
So what if I ascribe a ton of value to my messy room, my unpaid bills, and my dirty laundry? I have a ton of those things. Then I would own tons of objects of value.
Then I'll be rich.