You know people say - never be afraid of discussing your ideas? I believe one of the reasons for that is everyone's vision is different. So, even if I gave you an idea, I might see things differently than you do.
That said, here's my advice on finding a good idea - sell shovels during a gold rush. Now what it means find places where you can provide value by connecting two different parts of society.
One of the ways you do this is by building a robust "Customer Acquisition Strategy" for X business.
People had spare bed/couch at home but no way to find customers. Answer - Airbnb. The platform is so robust now that even full time B&B are using it for their customer acquisition.
People wanted to earn some money using their cars, especially in cities. But they had no way to connect with people wanting a ride. Answer - Uber.
Restaurants were spending tons on advertising but not getting steady stream of customers. If they wanted to provide "home delivery" it was an additional burden of maintaining a delivery fleet. Answer - Uber Eats, Grubhub, Postmates etc. Even review sites like Yelp etc are part of customer acquisition strategy as not only helps in great advertising when people see 4-4.5/5 rating but also assuage concerns on food quality.
So find a niche where people still have this pain and you might have a unicorn on your hands.
Recent non-aggregator examples for the "cloud" gold-rush: Docker and Hashicorp (Terraform especially).
I reckon there's plently of money left on the table for cloud-shovels (though the market is getting fuller by the second).
Though of course, as pointed out in a different comment - you'll need some experience with the problem-space in order to figure out what problem to tackle.
That said, here's my advice on finding a good idea - sell shovels during a gold rush. Now what it means find places where you can provide value by connecting two different parts of society.
One of the ways you do this is by building a robust "Customer Acquisition Strategy" for X business.
People had spare bed/couch at home but no way to find customers. Answer - Airbnb. The platform is so robust now that even full time B&B are using it for their customer acquisition.
People wanted to earn some money using their cars, especially in cities. But they had no way to connect with people wanting a ride. Answer - Uber.
Restaurants were spending tons on advertising but not getting steady stream of customers. If they wanted to provide "home delivery" it was an additional burden of maintaining a delivery fleet. Answer - Uber Eats, Grubhub, Postmates etc. Even review sites like Yelp etc are part of customer acquisition strategy as not only helps in great advertising when people see 4-4.5/5 rating but also assuage concerns on food quality.
So find a niche where people still have this pain and you might have a unicorn on your hands.