10 Years from now... Who do you think will stay?

Between Dropbox, and Google Drive, as cloud storage providers.

Let's say one of them eventually lost out to competition, maybe due to low paid subscribers, or to a switch in product focus... which one do you think will ultimately prevail?

I'm curious because I have an account for both Dropbox and Drive, and I want to stick with one (trying to lessen the number of accounts I have online). Ideally, it's easier to go to Drive since I'm keeping my Google/Gmail account anyway, but...