The lockdown keeps everyone at home and you definitely can keep yourself busy by studying new courses, or teaching courses online to your friends, contacts on social media or on training platforms
If you have a good capital, then you can learn proper ways of trading crypto if you dont know already.
If you have some online skills, then you can start freelancing.
Then there are real affiliate marketing that you can work with from home because now is a time to work from home.
It's a great time to learn programming, web design, etc.. If you have one of these skills improve the others. Right now is a great time to be a full stack developer as people are spending MUCH more time on the internet bored.