6500 not random for two major reasons.
Currently, Nifty EPS 390. PE 15 to 17 is an acceptable area where market trades 75% of the times and is highly likely to be touched. If PE 17 happens in the near future, then one can assume more or less EPS of 390, Therefore, 390*17=6630. Hence the estimate of 6500.
6500 region is the Top of 2008,2010 and 2013. It is also the low of 2016… see here… Hence, in my opinion is a major support for the market.
The economy is currently not good. It is receding as per major economic metrics. In fact, the world is receding in economic growth. This is not only the talk of town, but I have data to back it up. However, it all is likely to improve, but in the future. Currently, stock prices are inflated and economy growth is poor making it a ripe time for a healthy correction.
PS: Upset in general… yes a little bit.