Think there's some element of FOMO (people afraid that BCH could overtake BTC) as well as people not realizing they have BCH keeping BCH from crashing.

I don't see how BCH can conceivably overtake BTC, or even come close to it's market cap. BTC is accepted all over the world - there are even BTC ATMs. They way cryptos continues to grow is through mainstream adoption. While main-stream adoption is still in it's infancy, it has a significant leg up on all competitors, including BCH. I don't see what BCH will be used for aside from speculation, which makes it ripe for an eventual crash.