Except for stable coins and coins pegged to gold, silver or diamond, all other stand alone coins and tokens mostly depend on bitcoin, if you look and understand that market, you will know that while bitcoin is mostly traded against usd, almost all altcoins are been traded against bitcoin, so this is why bitcoin somehow controls mostly all the happenings in the crypto market.
But the truth is that this will not remain like this forever, in a few years to come, when crypto currencies must have expanded and become like forex, every coins should be able to stand on their and not be controlled by bitcoin anymore.