Bitcoin (in its current form) is not that usable when a large number of people are trying to use it. I used to be in support of Bitcoin, but I have moved on to Bitcoin Cash. We have continually been told that Bitcoin could work using the lightning network, but we have been waiting on that for a good while. Even if the lightning network could support all of the transactions that would be required (which I don't believe could happen), the block size would need to be raised. With the lead developers of Bitcoin not wanting to raise the block size, I think Bitcoin will fail eventually. Although I am for Bitcoin Cash, I think there is room for other currencies to exist alongside Bitcoin Cash (Ethereum, Monero and others).