This is totally crazy. Many people take bits Pilani cse after getting ranks even less than 2k. Heck, we have examples even here at goiit. I think @ayush_singh is going to bitsp CSE after getting 2002 rank in adv.
Don't drop. Goto bitsP.
Also, @Saiabhishek_Karumunu , BITSPILANI is the 6th institute in terms of rankings. For getting even IIT G which is ranked lesser than bitsP, u need a rank less than 600(for cse), which is 400 less than ur goal of air 1000. Not feasible. Think about it. It makes sense that u go to bits and not drop a year. The tag of bits is pretty good too.