Bch is bitcoin, page-12

56 percent of bch controlled by 67 wallets  the possibility of manipulation abounds. the most likely source of danger for BCH is however is extreme monopolisation and cartell behaviour by larger blocks .
meantime  BTC  hash rates set new highs  which esentially means that it would be hard if not impossible for  an entity to marshall the resources needed to succeed in a 51% attack
https://bitcoinist.com/52-quintillion-per-second-bitcoin-hash-rate-breaks-dizzying-new-record/