I'd say my only fear atm is the fear of failure.
Although I try to push it aside, since it's not really an option.

loss of independence (because of lack of money, or some fucked up disablity, or a hundred other things) - definitely my number one fear.

living to be a hundred y/o
mega-tsunami's

been there done that

Running out of toilet paper :(

My greatest fear is if I tell my greatest fear it will come true.