Actually, yes. Just think about it, if some random dude hacked into the internet and shut it down, the stock market would collapse, trillions of dollars would be lost, communication throughout most the world would be lost, throsands of companys would go bankrupt, even production of verious materials would stop at a dead stand still.
The internet is the thin plexiglass berrior between us and one billion gallons of freezeing wet deth! (I have no idea where that came from!)