The one thing you can rely on is if you get disturbed halfway through a painting and it looks a bit naff, then someone will preserve that piece, remove it and a few months later it’ll be paraded round Sotheby’s by people wearing white gloves.
If you don’t own a train company then you go and paint on one instead… it all comes from that thing at school when you had to have name tags in the back of something… that makes it belong to you. You can own half the city by scribbling your name over it.