Especially Americans; and probably other first world cultures; but I can't say definitely.
I speak from experience, having once been a young INTP and now being only a young-ish INTP (I will be 29 any minute now). Probably this advice applies to most on the NTP spectrum; E's as well, I suspect the J's, who will be your friends, will scoff at our malaise. But I digress.
If you are on top of the world, stop reading now. You've hit your groove; you somehow have a lot of social capital despite your deep introversion; just play that shit out and come back if/when you burn out.