On your roof is a scarecrow because you're rich. You want to scare away all the poor, non-rich people so you put a scarecrow on your roof.
You wake up the next morning and all of your riches have been stolen! You call the police and they call you a fool (ふ)! Pardon me?! "You basically put an advertisement on your roof telling everyone you're rich. Of course you got robbed, you fool."
Currently there are no similar looking kanji which exist in the WaniKani learning system