riddle the first right answer gets 10 points!!?

[saerana:D]

WHAT AM I ?
im 7 letters
all poor people have me rich people need me
im eviler than a devil but nicer than an angel
i know everything
i know nothing

 

[Brian M]

nothing ? got it after reading i have 7 letter and am poor.

 

[Shereena]

Why are you here?

 

[Kat]

7 letters you sed it..im 7 letters XD

edit: oh someone sed that already =/