Bitcoin cash (BCH) is a much bigger risk at this point because the mining is not as decentralized as Bitcoin (BTC). Someone could make a play with a 51% attack which could give them control of the BCH blockchain for nefarious purposes. The new interest in BCH will help to spread decentralization but the big players are going to stay with BTC for now and any stumbles with BCH will send BTC soaring again. It's like BTC is Coca Cola and BCH is Coke Lite, everybody wants "the real thing."