So this-or-that company promises you unbreakable encryption or that they won't poke their nose in your data. Do you trust them? I don't. All it takes is a little firm chit-chat from the national security agency of the country your data is hosted in, and your "safe" data isn't safe anymore.
If you really insist on putting files and shit in the cloud, encrypt it yourself before uploading it. Better yet, run your own server and provide yourself with your very own fucking cloud. Those who want real security aren't lazy and do the work themselves.