Some months ago I put a small amount of Bitcoin into an account and wrote the address and private key into a text file. I have left on my computers and on those of a couple of friends. The money hasn’t been taken.
Where does the main danger come from? Screenshots, key-logging or what?
My main motive in asking this is that I use bitaddress.org offline to generate addresses, but without using Ubuntu or taking out my hard drive. I never copy my private key onto the clipboard, and I wonder whether the danger I face of having my coins taken - particularly if I store more in this way - is real or merely highly improbable?