I trust anyone, including iCloud, but then all my data uploaded to a *cloud*, outside of music files, is GPG encrypted with a 4096 key, and that includes the Truecrypt containers I upload and store in the cloud as well, GPG encryption with a large key and super long pass is safe enough for the foreseeable future, at least the next 20 years I hope, and by then I won't care.
Disclaimer - I do keep local copies as well, redundancy is important as who knows when a *cloud* service will go tits-up as they like to say at El Reg...