Bitcoin is falling because the co-founder of Bitcoin.com said that he sold all his bitcoins for bcash. Also because bcash is now on Coinbase.
Have you checked the transaction fee recently? It is at all time highs. The average fee per transaction is ranging from
BTC0.0005 to
BTC0.0020 right now (i.e between $8 and $34 per transaction). In long term, I don't think that this is very viable. And during the last 24 hours, Bitcoin Cash have risen by 100% against Bitcoin. It is about to overtake ETH as the no.2 crypto.