8000 would require chaos in world economy . Screw up from just our government would not enough.
8000 is really not a big deal like you think. Barring 10 odd stocks rest of the Nifty components are already at 9000 said one report. If you look at the larger market, you can see the chaos specially in Mid/Small caps.
I think we grossly underestimate the market by thinking it cannot do certain things. Fact is 40-50% corrections are not uncommon in long term bull markets. After such steep corrections markets will climb back and make new highs. Look at the down jones . It has seen multiple bear phases within a larger cyclical uptrend.
I remember back in 2015-16 when Nifty was at 9200, no thought it would go to 6900-7000 levels but it did.
If you are an investor, you should be happy to find such huge dips.