Doing BCA is good only if you have interest in computers. If you don't have the interest and you study that field, then you will not get job in any field. Also, your question is not making much sense. It seems like you are worried about the recession in IT field.

The jobs are not getting reduced, but the jobs are transforming. New IT jobs demand new things to be known which are not taught in colleges generally. So if you have the capability to self learn, then definitely you will get a job in IT sector.