Bitcoin is currently more than twice the market cap of #2, Ethereum.
Do you think that altcoin hype is finally fading?
In my own personal understanding, Bitcoin and Altcoins aren't working or related that way.
Altcoins goes down because Bitcoin value dropped but when it pump back up then the Altcoins will follow. And you should notice that the Altcoin pairings in coin exchange aren't mostly into USD ratio but BTC or Eth.
Therefore when Bitcoin dropped, Altcoin BTC value is although the same but in USD calculation is should be dropping as well.
Bitcoin and Altcoins works that way.