Altcoins are just clones of bitcoin as they were formed from the image of bitcoin. While bitcoin is the founder of crypto market, the altcoins are considered the alternative coins.
However, since bitcoin dominates the altcoins, whatever the price of bitcoin, altcoins follow. If bitcoin price drops, their prices are bound to fall as well, and even much lower than bitcoin. But when bitcoin price surges high, not all altcoins go up as some have didn't manage to recover from price drops. That's how dependent altcoins are to the movement of bitcoin in the market. They want to imitate bitcoin so they can compete but will always fail in the process.
That's how it's been in the past, but what needs to be noted is that the situation above is just market shock therapy and the possibility for the crypto market to recover in the next few days because I'm sure Trump is thinking enough and saving his domestic industry first by making policies in the near future as well as the crypto industry.