That's a bit extreme, but any probes we have past Mars should still be around, and we have more than just Voyager traveling outside the solar system (New Horizons, Pioneer, etc).

I personally think we'll still be around in a billion years. Or at least some distant descendents of ours, that can trace themselves back to humanity. Once we can settle other planets, something that should be possible in this century, it would be just about impossible for us to go extinct, so our chances of still existing in some way millions of years and more from now go way up.