There are two kinds of forecasters: those who don't know, and those who don't know they don't know. - Be careful when you are not afraid of anything.
In regards to stop loss, you need to understand there is a limitation to it. It is a powerful tool for traders to minimise loss, aka reduce risk. In normal market conditions, stop loss works because there are ample of liquidity provided by willing buyers to take your trade. However when market panics and crashes, when everyone is heading to the exit door, that's when there are high volume but zero liquidity, there are no willing buyers. Stop loss will fail to work at the time you needed most.
That's good advice, thanks Dreamxite. Can imagine there will be a bit of that going on now in the current market conditions too.