Let's think about the word "storage" for a moment. If I take my bike and put it in storage I only have the one bicycle so my storage must be secure and trustworthy.

Here's a person that you may know and what they have to say about this cloud and cloud storage.
http://news.cnet.com/8301-17852_3-57486930-71/woz-the-cloud-is-a-nightmare/

So if I stored my files there I would be foolish. But if I stored files that I just want a spare copy somewhere, just in case and didn't care if others could see them, then why not?
Bob