The volatility is too big leads to a problem, you can not easily choose the right point to buy or sell. And of course if you're buying or selling the wrong timing, you lose very fast cause as you said they changed big for everysingle 5 minutes. Actually in this case, you should do anything when it happens.
Volatility leads to problems for people not understanding how to trade this market properly. Solid traders are prepared for whatever level of volatility that comes their way, and the more severe the volatility gets, the more profitable their trading sessions become. People quite often underestimate trading because they look at the charts and see that the market has bounced up and down, but at the moment they are going to dive into trading, they suddenly don't know what to do anymore. Everything that they end up doing, will be nothing more than a blind guess/gamble, and that's exactly how people land themselves into big losses - there is no way you can keep depending on luck endlessly.