Update: bitcoin has been losing dominance, mainly vs bitcoin cash:
A bit over 5% and some people commenting recently seem to not have realized. There are some gains in dominance but from all the rest of small alts together, nothing very significant. What is significant is Bitcoin Cash spike as there are many debates on wether it will become the real Bitcoin or it is just another case of pump and dump.
Bitcoin Cash is just a shady fork by Bitmain that is trying to play central bank and protect its ASIC business. Complete waste of resources. Hopefully the new crypto investors will actually understand what Bitcoin is about and realize that Bitcoin Cash is the opposite of what Bitcoin should be and move away from it.
But how is the original Bitcoin different?
If it is the same ASIC mined coin like Bitcoin Cash? As for myself, there is no real difference between these two Bitcoins in this regard. Any miner which mines one Bitcoin can mine the other. Yes, SegWit has made some "adjustments" no longer possible (if I'm not mistaken), but is it the only or main reason behind the creation of Bitcoin Cash? I think the game is much more intricate, complex and convoluted than that. Right now Bitcoin is controlled (if I can say so) by the Bitcoin Core team which do not belong to the world of miners. This is surely not what big-time miners are quite happy with, and changing that seems to be their higher cause. In a nutshell, it is a struggle for control over Bitcoin (under whatever name)
The Bitcoin Cash team is actually looking into implementing a much "quicker" adjustment times of the network difficulty.
At least officially it's under the guise of making it easier for miners to adapt so they can earn more profits. But in reality it's a fact that their team controls around 60% of the hashrate, so all that does is give them much more flexibility in manipulating the network to their will.
It's also very strange that one of the biggest promoters of Bitcoin Cash, Jihan Wu, would act in favour of blocking the SegWit2x fork, which was immediately followed by a pump of the Bitcoin Cash value. I highly doubt the timing was a coincidence and if you consider the fact that these individuals control a very large amount of both currencies it would not come as a surprise if they flipped their own BTC/BCH to start a FOMO pump.
While Bitcoin is definitely quite centralized, mostly due to the fact that China and the US jumped in first with a massive headstart, I don't want to have anything to do with the shady behind the scenes kind of bullshit that Jihan and his goons are pulling off and I'm hoping that new competitors like GMO in Japan and some others will actually bring some fairness back into the scene.