Crosby stops at ~1600 ish.
He'll definitely get more than 1600. He's 31 right now and can still put up over a PPG.
Assuming he plays till ~40 (not that rare...even a guy like Marleau will be playing adequately till 40), he would only need to play at a 50 point pace to get to 1600.
I think he gets around 1750-1800 as long as he's relatively healthy (70+ games per season).