Bitcoin Cash is a fork that happened to BTC some time ago. In my opinion BCH is much better, because it is 10x faster and the transactions are also cheaper.
Sometimes cheaper and faster doesn't mean safe and reliable.
Bitcoin is a coin that has the Cryptocurrency flagship developments so improving and being able to control the State of the market. with the State of the Bitcoin who continue to experience increased this makes Bitcoin more interested and supportive to her progress. I assure to select Bitcoin and count on it.