Just look and the chart of the last seven days on coinmarketcap:
https://imgur.com/a/zGaCIIt all looks pretty much the same, even though the coins are different and the news vary as well. Well, actually, I would say that it is the news with btc that rule the market now. The question is why the capitalization of different coins is so synchronized with bitcoin? They don't really depend on it, do they? About a year ago I was arguing with people who said that altcoins went up along with btc and always followed its patterns. That's not true. Even if you look at recent historical snapshots on coinmarketcap you would see that, for instance, when btc went rather rapidly down from $19k to $14k, bitcoin cash and ripple were going up pretty fast.
So why is everything depending so much on btc now?