Careful who you trust, lots and lots and lots of FUD and lies from everyone on reddit, at the very least.

The tl;dr is that many people believe the current bitcoin core development group to be some combination of malicious or incompetent and they have refused to increase the block size (how many transactions can be done per ~10 minutes) and so transaction fees have gotten huge (~25$ per tx on average).

There was a community proposal back a few months ago called the New York Agreement, NYA, where miners and businesses came together to update the network to twice as large blocks, as a stopgap fix for now. That attempt was called off because of it being contentious, which many here (myself included) would say was due to the core group not wanting to give up control as the "reference client" more or less, they were the biggest opponents.

So before the first part of the NYA went through (segwit), a group of developers forked the network with their own client, and created bitcoin cash (typically, BCH on exchanges, sometimes BCC). Bitcoin cash does not have segwit, and focuses on lower fees by having much larger blocks (8MB, vs core's 1MB).

Cash currently has negligible tx fees (pennies, or less), and many (including myself, again) see it as the true bitcoin, since it most accurately implements the system described by bitcoin's original creator, Satoshi Nakamoto in his whitepaper - https://bitcoin.com/bitcoin.pdf or https://bitcoin.org/bitcoin.pdf

Above, I link two sources for the whitepaper - bitcoin.com is run by Roger Ver who is pro-bitcoin cash, bitcoin.org is pro-core devs. I believe both pdfs are the same as of this post, but there was talk of changing it on the bitcoin core github, I'm not sure if that went anywhere, but that would be inexcusable if they did so.

If you have any questions, please feel free to ask, I'll do my best to stick to the facts, but of course don't trust any one source.

It's all sort of a mess, really.