Dropbox + TrueCrypt = Secure
Depends if you are decrypting within your Dropbox folder, or moving it outside and manually synchronizing it encrypted again back to the Dropbox folder.
I set up an ownCloud instance for this exact reason. I took an old computer I had, installed Ubuntu and then ownCloud. Now I have as much space as I want and the only person that has access to it is me. It's not perfect, but it's good enough for me and, imo, offers more peace of mind than public clouds.
No because there's no alternative. iCloud is good for syncing Apple devices and uploading little iWork docs but it's not so good for storing photos, videos etc. and Google Drive, ummm... If you abandon dropbox due privacy problems, Google services are not really a good idea.
No because there's no alternative. iCloud is good for syncing Apple devices and uploading little iWork docs but it's not so good for storing photos, videos etc. and Google Drive, ummm... If you abandon dropbox due privacy problems, Google services are not really a good idea.