All or most of savings in bitcoin? I hope most of even the forumites are smarter than that...unless you are young and/or have very little savings.
I have all my savings in BTC. Of course. I'm not and idiot.
Are you american? (and still a strong believer in your monopoly toy money?)
I have a well I diversified portfolio (including some bitcoin). I am not overexposed to any particular risks. I sleep very, very soundly at night.