It does seem like that when bitcoin goes on a rally all the other altcoins greatly suffers.

The bull run seems to be temporarily over, though. With prices currently at $13k or under on major exchanges that is a $5k reduction in price compared to the peak of the run up. I'd say that $20k should still be easily achieved by the end of the year, though i'm not sure exactly when it'll happen and it definitely will not happen this week since there is only a day left.

This should prove to just be a temporary pullback before another rally.