Is it worth doing an M.Tech in IIT Hyderabad leaving a placement of 7.0 LPA at FTD?

Since you did not mention your specialization, I will assume you belong either to the CS branch or the EE branch, both of which are equally in demand right now. Today, IIT Hyderabad is considered a highly esteemed engineering institute that has very young and dynamic professors. The unique aspect of the institute is its zeal for learning and exploring new things. The professors teach in such a way you will find the ambiance very friendly and light. Although some might hesitate to leave a 7 LPA job for higher studies, I would recommend the opposite. I can guarantee the institute's worth and credibility in providing you with better job opportunities once you complete your Masters's from here. For a slight idea, the average salary of CS and EE after MTech is around 12-30 LPA, much more than your current salary. 

Trust me when I say an MTech in CS or EE from IIT Hyderabad will be much more beneficial in the long run. However, if you are from a Mechanical, Civil, or Chemical background then I would suggest going for an MBA from Top IIMs.