He has 5 years work experience not some fresher. For your information, that's not 50 LPA in hand.
Recently seen a post in which OP stated that he got an offer from Nykaa and MMT. He has 6 yrs of experience and CTC they were offering was 45+6.
Nowadays freshers getting CTC of 50 LPA are getting only 1L-1.5L in hand. It's true that MERN has saturated and it's also true that we don't have many highly expert and specialised MERN Devs. For e.g. how many MERN devs have you seen with og experience in optimizing backend, implementing scalable microservices/communications/microservices handling large bandwidths, highly responsive, optimized and complex frontends etc
So, yeah! If u have expertise to do build something that many others can't do, then u don't need to worry about anything:)