It is about the influence of Bitcoin on the crypto world. Yes, for those reasons, we have seen how Bitcoin will always be dominant in the market, be the first, and altcoins will be always following.
However, sometimes, not all altcoins will be following, some new altcoins are jumping high when the price of Bitcoin gets dropping.
But it is only some, most will be following.
This is not a secret anymore, we all have noticed this. And Bitcoin will be still here, with or without other new altcoins