What did the rich fool in Jesus' parable plan to do with his abundant harvest?

Answer: Build bigger barns

He planned to tear down his barns and build bigger ones, but God said, "You fool! This very night your life will be required."

“Then he said, ‘This is what I will do: I will tear down my barns and will build bigger ones, and there I will store up all my grain and my goods.”— Luke 12:18 (BSB)