It is a very interesting question that you pose. They say, that the true insight comes from the ability to pose questions, not from giving answers

So it really made me think. You may compare bitcoin to gold, and that comparison is sound in a lot of ways (limited supply, store of value, etc.) and unsound in others (bitcoin is much more abstract, you cannot weigh it in you hand, you can't make a nice ring out of it), but for the sake of this discussion let us make that comparison and go forward.
Well, gold has never been the reason for crisis. Rather, gold was the escape from crisis and a way for one's wealth to be preserved. If you were smart enough to have gold, then you were kind of immune to the price hyperinflation and misery all around you, and after the crisis is done you emerged even stronger than before. But as far as my knowledge goes, gold was never the cause behind the crisis.
Bitcoin is something like that too. I don't think that it with its price fluctuations can cause problems. Rather, the price fluctuation and its rapid growth is
an effect of general instability in fiat pseudo-currences and debt fueled economies. I think that it offers a way to escape and preserve your capital. This is maybe why its value should not be denominated in fiat currencies, rather it should be considered as inherently valuable.