What business makes a lot of money?

I'm curious, what kind of business consistently generates significant profits? Is it the tech industry, with its rapid growth and innovative products? Or perhaps it's the finance sector, leveraging investments and capital to drive returns? Are there any industries that have a proven track record of profitability, despite the challenges of an ever-changing market? I'm particularly interested in understanding the strategies and practices that enable these businesses to thrive and make a lot of money.