In the cryptocurrency market
There are no laws
Some times you see that BTC climb up and take some coins with him
And some times you see BTC climb $ 100 and other currencies down by 10%
So I think there are not always links between them
true, sometimes between bitcoin and altcoin do not have the same path because they have different technologies but all will return to the influence of investors. because if the investor starts throwing away all the assets then the price of any coin can decrease.
They are related as bitcoin still the main basis inside the market, so each time bitcoin move it will reflect somehow with alts value, might be not always in a positive side as investors and traders also have its own interpretations, most of the time when bitcoin pumped a lots of alts being dumped as traders wanted to have more bitcoin stored from their wallets to exchange to there local fiat.