During market pullbacks and crashes, when others panic and sell, it's the time to continue investing, even more aggressively, into strong funds.
"even when you see a market turn down a market pullback you keep investing because that's when people panic they freak out they see their their funds get cut in half they see the markets get cut in half and they they panic and that's where most people are selling but that's the time where you don't want to stop buying in fact that's the time you want to be buying even more aggressively assuming you're investing your money into a strong fund"