Fiat currencies and stock prices don't have a minimum landing value, the unit price goes to zero if people lose faith. Even for gold the intrinsic value is much less than it's "faith" value. There's nothing exceptional about Bitcoin in this respect.
Central bank guarantees are looking shaky lately. Over the last century we've seen numerous countries get into a money-printing spiral leading to hyperinflation and fiat currencies don't survive that. This is Bitcoins' point of difference - there's no central authority able to succumb to the temptation to print the stuff. As for volatility, it's early days.