If you store anything in Apple's iCloud, you should read the following article. Just to be on the safe side, after reading the article, I set up a two-factor authentication for my iCloud account.
Will be 'interesting' (if that's the right word) to see how this threat turns out.
http://www.computerworld.com/article/3184030/security/hackers-demand-150k-ransom-threaten-to-wipe-millions-of-apple-devices.html?
Jim Hamm