As far as I am concerned, it is a good time to buy more BTSX which I have been doing during the downturn and will continue to do so as long as the price is falling. If/when the BTSX price falls below 4000 satoshi, then I will unload some bitUSD to buy more BTSX.
EDIT: FWIW my last BTSX purchase was today when the price was 5510 satoshi. I will just sit back and see if it falls below 5000 sat to buy more BTSX.