Xapo dump shouldn't have started yet I think the deadline was the 14th but up until that date their users could either withdraw or invoke a manual autosell which is probably what you see happening
BTC difficulty has already occurred this wont affect anything due to the new DAA on Bcash
Other big things like what ?
shouldnt have?....its almost over as u can see

maybe its xapo, maybe its xapo users,maybe its barry himself lol, either way only 900bch left...btc dif will change soon.
other things....ooo laa laa ....not saying just now

I will tell you , i know alot of big players getting fatter BCH wallets right now

BTC diff changed 20 blocks ago ? and maybe users invoking manual sell to get as much BTC as possible instead of waiting since BTC is going up fast and BCH is pretty stagnant and loosing value to BTC fast
Big things are happening on BTC too LN spec is final and testing RC1 and working on mainnet with a public mainnet beta to be released soon