If you love markers, work with markers. You don't have to do what everybody else does. And if you want to learn digital because you think it looks awesome, then learn digital! It's as simple as that. If you do what you love, other people will recognize it. And most of the time, doing something different will make you stand out from everyone.
ONE final note though, if you're looking to be a concept artist then you definitely need to know digital hahaha. can't avoid that one