Roth vs Traditional help

I recently rolled over an old 401k with ~$70k into fidelity and it was split into seperate accounts (~$55k Roth and ~$15k traditional). I'm guessing this is because I invested into a Roth and the company match must have gone traditional. I'm 29M and plan to buy a large amount of VTI for the Roth account. But what do I do with the $15k traditional? I can't think of any scenario where I would prefer anything in a traditional account at my age.