Either he wants to accelerate the success of the BCH or push the bitcoin price for tactical reasons, I think. Although the priorities with the transfer time and the fees are serious. I am looking forward to the upcoming days.

He isn't completely wrong in current state of high fees and high confirmation times, it's almost impossible to use BTC as an currency. But I doubt he has sold all his bitcoin, even if btc is unusable, it's still damn good investment. And well the BCH is pump is just because coinbase now has BCH.

Even if there are disadvantages of using bitcoin, still, no doubt BTC is still the top digital currency in terms of usage and popularity.
So maybe, he's just saying that but in reality he has still some BTC reserves. We don't know the real facts here.
He's only of those btc holders that "sold" his coins and other people who own btc are still buying more as they see it as a good investment.
So no need to panic selling your own bitcoin. Just another disrupting news in crypto world.

I think that's a good strategy. It is a good publicity so that more and more bitcoiners will sell out their bitcoins into lower prices. They wont stop bitcoin because right now, its price is really high and developers will benefit from it.

Being associated to bitcoin dot com domain gives BCH undue advantage.

Though the BTC txn time and fees are a serious challenge now.

let me see.
the founder of largest bitcoin site means the owners of bitcoin.com. and who are they? the answer is the same people who created bitcoin cash!

it doesn't get any more obvious than this! do you think someone who created something is going to say the competition of that thing is good and say they are investing in the competition? no they are going to say they have dumped the competition and bought their own creation.

in reality they are the biggest owners of bitcoin who just spread this FUD in order to do two things: pump bitcoin cash and make profit from the rise, also cause a drop in bitcoin so they can buy more of it at the bottom.

Yes,his motive is to dump bitcoin price any way and to promote BCH.Earlier his friend roger,the bitcoin antichrist tried his best pumping BCH creating a record in the crypto coin history by pumping BCH to reach $1,800.But at last,it failed and could not replace bitcoin.Now,on seeing wall street firms entering bitcoin market and bitcoin price reaching ATH,they are helpless and have started to scream at bitcoin that bitcoin is virtually unusable.But its just a temporary issue and would get fixed soon by activating lightning network.Poor boys,let them shout.

Everybody can understand that this has been a clear strategy from Bcash owner and Bitcoin website owner to declare Bitcoin unusable.Though this has affected slightly to bitcoin and has given slight edge to bitcoin cash. But this dirty game of a sharp mind has done trick but will not last for long.This pump and dump strategy is too old to last longer.