Granted, you build the best computer ever, but then your house caught fire one day while you were out. Due to secrecy, as you had the best computer ever, you had no neighbours so noone could call for help.
I wish I could walk on water, with still being my normal human self.
Granted, but it can still be stolen, someone steals it and throws it at you.
_____________________________________
I wish i had an infinite supply of duct tape.
You get it, and now your the richest man in an apocalyptic world
I wish for exactly 3.45 grams of sugar to be donated to the good people of Nuuk