This will never happen because Bitcoin plays the leading role for all Cryptocurrency. If BCC overtakes BTC, this Cryptocurrency market will enter a new era and BCC will play the leading role.
Couldn't agree more with you, mate. If will make a drastic change in the whole cryptocurrency market, as the pioneer cryptocurrency is the "reserve currency" for many of the altcoins we know today.
However, the odds for this to happen are very minimal, as Bitcoin Cash has been lacking a true development team (as far as I'm aware of) and innovation. If it manages to solve some of its issues (like the ones currently being faced as miners switch from one chain to another due to profitability) then it could remain as a solid and stable cryptocurrency.
But if BCH remains as is, then it will have a hard time trying to rise in popularity and value, as the original Bitcoin will emerge stronger than ever.
For BCC to overcome Bitcoin, Bitcoin has to show that it was wrong about Segwit and Layer-2 i think.
As of now its too early to say and Bitcoin is still strong because layer 2 opens up big possibilities but no one know if it will work or not
BCC is stuck not being able to go beyond $700 it appears
https://www.coingecko.com/en/price_charts/bitcoin-cash/usdAgree. If Bitcoin fails with its block size increase solution, then BCH might have an advantage here. It is up to debate, whenever the hard fork to 2mb will be successfully implemented on the main chain by November, as it opens up the possibility of creating another chain split, eventually leaving us with 3 different versions of Bitcoin.
But, if all goes well, then Bitcoin could emerge stronger than ever to be able to increase exponentially in value and user acceptance worldwide. Bitcoin Cash by the way, has been declining in value, probably by its inflation rates as miners are quickly finding blocks because of BCH's current difficulty adjustment. This is a very bad thing for BCH, as it will lead to plummet in value if no proper solution becomes implemented.
In the end, it will only be a matter of time before the market and the people decide which will be the longest chain and the true Bitcoin to stay. Whenever it is Bitcoin with SegWit2x, Bitcoin with SegWit and 1mb block size, or BCH with its 8mb blocks, only one will remain as the most solid cryptocurrency in existence. Just my thoughts