I have a theory, that some coins influence BTC price negatively,
In the past i felt that once XRP goes BULL, it stops BTC BULL
and now, i see once XRP was dumped after the airdrop, BTC went bull again
The least we can do is to speculate and think about that the demand shift to bitcoin after it pumps again and was changed once XRP showing some good sign again, remember these two are the most hype right now an many was keep looking forward to gain some decent profits with it. But I don't think we can see those scenarios frequently since once the whales get used enough either with bitcoins and xrp for sure the alt season will follow.