Was't the increase of Bitcoin Cash tokens value one of the premises that will trig Bitcoin "Death Spiral"?Until recently I was mostly content to ride Bitcoin's ups and downs; the risk of near term total failure never seemed that great. Now, I believe the risk of failure (of both chains) to be much higher: the legacy Bitcoin can enter a state of Death Chain Spiral paralysis (great articles @lunar) while at the same time Bitcoin Cash proves unable to support the mining base, which crashes into bankruptcy leaving a mini-bitcoin and the field open for an alternative crypto to dominate
If this doesn't happen no Death Spiral will trig, in the opposite scanrio Bitcoin Cash value will rise and it will able to support the miners.
Any other scenarios I could come up with involves the miners shooting themselves in the feet or an attack carried bye one of the infamous "state size" malevolent actor. IMHO the latter could have happened even before the Aug 1st fork.
Other things I'd like to add to the mix:
- the new weaker security model that SegWit will bring to the Bitcoin chain (see excellent @Peter R's presentation at TFOB). To make a long story short SegWit introduce an incentive for miners to mine block without verifying the txn sigs (if they did now they won't be able to collect txns fees).
- the change in economic incentives induced by 1MB constraint and the fact that from mid beginning of 2016. Such change will reduce the security of the network the long run because it reduce miners' fee produced income transferring it to 2nd layer actors.
So I guess that the Bitcoin chain do not have just one enemy (Bitcoin cash chain), it has also to fight with all the changes made to the protocol that are fracturing and eroding the solid base it used to be built upon.
edit: just wanted to add an image from @Peter R to give an idea of the amount revenue shifted from miners to 2ns layers operators: