There is no definite answer to this question as there are a multitude of businesses with different levels of profitability. Some businesses may be more profitable than others depending on a variety of factors such as the initial investment, the target market, the competition, and the overall business model.
Some ideas for profitable businesses include:
-Starting a blog and monetizing it through affiliate marketing, sponsorships, or advertisements
-Starting an e-commerce store and selling products online
-Launching a new app or software program
-Providing consulting services