After MCA, you'll have many options. You can for PhD in IITs. You can also do Master's of science (Research), or can appear for GATE. After doing MCA, you can good jobs in IT Sectors. Companies like IBM, HCL, Wipro, Cognizant etc with handsome salary. If you wish to do an specialization course after MCA, you can join trainings like Software developing, App Development etc which are mainly of 3 or 6months.