Fun and English

           

Look at this painting. Can you guess who painted it? In what way is this painting connected to dreams? What is a dream? 💭💭💭

👷👷👷👷👷👷💁💁💁💁💁💁 👫👫👫👫👫👪👪👪👪👪👭👭👭👭👬👬👬👬 I grow every day, but I cannot be farmed. I am important to humanity, but have only recently been studied. I increase where there is poverty, and decrease where there is plenty. Some people think I should be controlled, but no one knows how. What am I?