Are We Wrong about Bitcoin Cash BCH?

I have been wondering and reading a lot about BCH (Bitcoin Cash), Most & Major wallets and miners are not accepting it. however it came to exchanges, When it got split the price was near to $300 USD which fall down to near $250 and was keep on falling down.

In last couple of days somehow Bitcoin Cash manages to cross $700 USD in value.

Now the questions are:

Is this just a temporary hike.
Is BCH, here to stay, just like ETH & ETC ?
If more and more people were selling it out, as they claimed?

In a post Hive account@penguinpablo pointed it out Bitcoin Cash is not Decentralized because 92% or more blocks are being mined by only 2 miners... If this is true, what's the point in investing?

Would like to know your thoughts on this one in comments below.