Where are all the drones that were purchased 3 years ago? You could set up a repair shop for broken drones. You can train beginners on how to fly a drone. You could find idle drones and hire them out at a commission to people who need to use them.
There’s a worldwide headache, the silent ache of slow smartphones as a result of installing numerous apps, some of which we don’t use in weeks. If you have coding skills you can find a way for smartphone users to run their favorite apps on a cloud (remote server) instead of downloading and installing them on their devices which eventually affects performance especially for the cheap ones.
Even though electric cars have been here for a while, it only a very small percentage of people who have had a chance to ride or even drive one. If you know a friend who has an electric car you could let people test drive at a fee. The curiosity to rev a completely silent motor will keep them coming.