~snip~
The above chart has two attribute, one is Bitcoin fees in USD and other one is BCH price in USD. You can clearly see Bitcoin fees is directly proportional to BCH price. When BCH price rises, BTC fees rises. Now why is it like that? The answer is simple, BCH market is nothing but an illusionary attempt to overtake BTC in race of being real Bitcoin and this movement is backed by most of the miners (mostly antminer ones) because difficulty of BTC mining made it less profitable whereas BCH mining is still cheap. So when BCH price rises, they just move to BCH and as a result BTC fees rises (Demand/Supply) rule.
But every time it proves temporary and BTC recovers sooner or later because of huge faith by investors in it. So fees will decrease soon and BTC dominance will increase again.
PS: everyone above blaming Increased Transaction fees and slower transaction to be the reason, please have a look on my answer.
I have even more interesting chart:
As you can see, sometimes BTC fees spike, but Bitcoin doesn't crash and Bcash is not getting pumped, but on some other date fees are spiking to very high levels while Bcash is pumped and BTC is dumped. So, what's going on? Well, I'm pretty sure that those unusual fees are the result of spam, not just some 1 sat/byte transactions, but really expensive ones, like 100 and 200 sat/byte - this is part of the plan to convince people that BCH is the real Bitcoin because it has cheaper fees. But so far it fails miserable - even with all manipulation and spam, Bcash can't sustain its price for long, because educated investors are not buying that crap.
It comes down to Coinbase allowing public to vote
BCH or btc
Now we know public trading of BCH has leveled the playing field
1 week ago BTC to bch value was 10 to 1
Coinbase opens to bch
Now it's 5 to 1
It took couple of days to half the value ratio difference
Throw out the charts the public now goes to Coinbase and sees two Bitcoin
One is cheap and fast the other slow n costly
So BTC fell and BCH rose
20k BTC hit 11k now it's 15k
2k bch is now 3k
So pre coinbase 10 to 1 value ratio
Now it's 5 to 1
Before btc crashed to 11k you had 1 guru saying BTC was going to 10k and BCH would be 1 to 1 value or 10k
Due to Coinbase and how the public will choose bch over BTC for speed and cheap txs
He said that 2 days before the crash
He said the 1 to 1 value ratio adjustment will take 2 weeks to 2 months
There's threads here discussing his warning to investors
THE PROPHET is
.
www.SolAdoni.com
it would be really easy to make a larger splash on the public with a different coin, if only someone tried. 
