Don't understand about Bitcoin Cash. It is written here:
Bitcoin Cash is an altcoin which forked from Bitcoin in order to raise the maximum block size from 1 MB to 8 MB.
Anyone who held Bitcoin prior to the fork had the same amount of Bitcoin Cash following the fork.
So, bitcoins were automatically converted to Bitcoin Cash.
But they have different price and actually different currencies.
Some people want to keep Bitcons, some Bitcons Cash.
Or I understand it wrong?