There are a number of good startup business ideas, but it really depends on what you're passionate about and what you're good at. If you're good at problem solving and have a passion for helping people, then starting a business that provides a service or solves a problem could be a good fit for you. If you're creative and enjoy making things, then starting a product-based business could be a good option. And if you're interested in finance and investing, then starting a financial services business could be a good idea.
Of course, there are many other potential business ideas out there, so it's really important to do your research and figure out what would work best for you. Once you have a few ideas in mind, you can then start to develop a business plan and see if there's a market for your product or service.