I majored in it and actively work as an actuary, so I'd like to think so. Though at the higher theoretical levels my interest (and thus aptitude) fades--algebraic topology comes to mind.

Here's a recent video I watched on modular forms by the man who wrote the one sentence proof of Fermat's theorem on the sum of two squares. Maybe I'm not so good after all... the guy is a beast.

https://youtu.be/ndTESFYSkTU