I do not know about your interests but emerging technologies like cloud, blockchain, ai, security are all going to develop more in the upcoming 10 years with all the hype and bubbles. So there is money to be made at present. However I can't say if these will survive after 10-15 years. After 10 years, I believe quantum computing, space engineering, and robotics will be as booming as AI right now. Battery manufacturing can be the next big thing for the indian industries given EV demands are increasing as well as it is required in all kinds of devices these days. So battery engineering is a way to go as well.