It is possible, but not now. You know the price is going down again, BCH may have a rally soon, but 0.18 btc is undervalued, I think the reasonable value is 0.25-0.3 btc.
It's now or never. If BCash doesn't manage to take over anytime soon they will run out of coins to manipulate the market with. Hopefully it'll just disappear, BCash is a scam.
It's more or less over now. BTC gas managed to get up to $6.8k now, do you think BCH is capable enough of making BTC fall again, No. At best people can expect BCH to keep above $1000.
Roger Ver and Jihan Wu still have a lot of BTC, BCash and fiat to manipulate the market with, so they might try to pull off some more stunts in the future.
But given the market's reaction their chances of succeeding have been lowered dramatically.
I wouldn't say it's impossible for them to win anymore, but I just don't see it happening.
Jihan Wu knows a thing or two about psychology. Right now I think he's waiting for nervousness to reach a certain level in the market like there was in the days just before the Segwit2x fork got canceled. Bitcoin holders were expecting a correction and that is when the Bitcoin Cash team struck.