Yes, you can take professional courses such as CA along with your graduation. Although you might face problems in college attendance as most college will require 75% attendance compulsory and as you will be taking tuitions for your professional courses. It might get difficult to manage both at the same time but there are many students that follow this path. So if you are good with time management then you can surely go with it.

About the CA course, it is not likely that any other course in this field will take over as every other day especially in our country, so many people are getting aware about personal finance and term related to finance. Hence it can be said that the scope and demand of CA will only increase in the next 4 to 5 years.