It is very clear that you are saying that when bitcoin experiences something altcoins usually have an impact but not for all altcoins that are usually influential are the top-ranking altcoins that receive the main impact, but not other altcoins, usually altcoins that are still trading are still actively trading on the exchange.

but I don't agree that altcoins are decreasing because people are moving their money to bitcoin. Their market shares are intertwined, but when bitcoin goes up, altcoins are not always sure to move up as well, but the impact is a few moments later. only ethereum always follows every movement wherever bitcoin moves, so he also follows it.