Is big data good career option for commerce graduate?
Its recommended for BCA and Btech Students.
For Commerce graduate we recommend going for CFA, CA, CS, CPA, FRM course which is helpful.

Its a great option for a commerce graduate , you will get into business analytics while entering into corporate world and BA's scole will only increase in future with increasing population big companies will need people to analyse that big data for managerial and strategic decision making.
Try to learn a few softwares related to analytics ,this will increase your market value when you apply for companies.