I love meditating or doing anything brainy but never won competition. Should I write my common app essay on this

Well, what prompt would you be answering if you wrote about this? And what would you actually write about? When you write your common app essay you need it to be engaging and for it to tell a story about who you are. It's one of your only chances to show an admissions officer who you are.

Maybe you can provide more detail about what you'd actually say if you were to write your essay on this topic but until then I would suggest brainstorming some other ideas because I'm not sure this topic is strong enough to really win over an admissions officer.