There is no direct dependence, but traders of altcoins also react to the bitcoin course. Now the market is relatively stable and there are no special leaps, but some altcoins can show growth, reacting to the positive news of their projects.
We are in the sttement that the botcoin is the main foundation of the cryptocurrency so that it ffects ll alternative coins when some changes happen in the bitcoin. I don't have any clue thay hat lternative coins does not rely in the bitcoin because this is what i know tht the bitcoin is the leader of all digital currency