I think you should view the Bitcoin Cash pump with a healthy scepticism.
Take a look at the biggest exchanges by volume and you will see that
41.24% of trading volume has taken place at Bithumb (Korean exchange) in the last 24 hours.
https://coinmarketcap.com/currencies/bitcoin-cash/#markets
People with certain accounts or vouchers (you can actually buy them) are able to trade at Bithumb completely without fees, which enables
people to wash trade by essentially buying and selling into their own orders. This is basically the same situation that
existed at the Chinese exchanges back in the day.