Canny sounds like Granny. Granny is shrewd in money or business matters.
Canny sounds like Penny. A person who doenot like to give away his penny is canny.
Canny id dervived from can : (in the sense: to know how)
canny ~ cunny == cunning means dhoort in hindi
canny-can any penny..not to spend much and to store more
Canny - cunny (Kunjus )
canny can be remembered as "KEN"whcih means perceptive and haveing good judgements.
Canny business of making money using Pepsi cans
canny = can + any; I can do any work i.e. showing self interest.