Ask Luna holders for their opinion on this matter, it seems they experienced pretty much the same thing (or holders of any other crashed cryptocoin). Bitcoin itself might not be down 100%, but it also lost a serious amount of value in the last half year. Plus, there are a lot of ways to completely loose your bitcoin, be it hardware failure or scams.

So yes, I can say with a pretty straight face that Bitcoin is not a great protection against volatility, which is what the original comment claimed.