Just because something is integrating the private browser doesn't mean that the same won't happen to other coins as well. Yes integration is important but you shouldn't just rely on Tor, the underlying technology of the coin itself has to be safe as well, I guess Tor can be integrated in many of the other coins and it will happen at some point. Until then of course Deepcoin will rise in value but only as long as other projects don't integrate the same thing, it's in other words the only thing that makes it different than the rest. When other projects implement a similar structure it won't be unique anymore and it won't be able to differentiate itself from other projects.