The previous posts pretty summed up everything there is to this dump in Bitcoin and pump in Bitcoin Cash. Well, the natural reasons would be the new listings of Bitcoin Cash in some not-so-small exchange platforms with a significant amount of trading volume. The other reasons would be that one or two big names within the Bitcoin Cash circle is dumping their huge Bitcoin holdings and used the proceeds to buy Bitcoin Cash. The catch is that the former cannot cause as large a spike in the charts as the one we are seeing right now. The latter could.
More than likely that's what happened. But I believe,
BTC price will go back to its increasing trend again.
We've seen this kind of behavior already, remember the China thing - banning ICOs.
And the whales are having their party every time this kind of scenario in crypto trading happens.
You need to be a strong hodler of
BTC, else, you will sell also your small amount of btc.