It's pretty common for the entire crypto market to fall in unison during "Real Bitcoin Crashes."
That said, I'm still not sure if this will become one. We're not even at 1/2 the peak price. Serious crashes fall to 1/4 to 1/10th of the peak (so $2,000 to $5,000 in our case).
It could just be a bit slower to get down there this time. Though I hope that the market is more mature now and it doesn't get there at all.