This is nonsense, Bcash is in no position to do any serious harm to Bitcoin. If you are worried about a $500 crash, then you are part of the problem - you spread panic and FUD. Satoshi, if he is still alive, had no obligation to do anything, no one has a right to tell him what to do with his coins. Satoshi left us because he didn't want to be a dictator, he wanted Bitcoin to be truly decentralized, so begging for an almighty savior is against the spirit of Bitcoin.
The problem is not the price, fiat is infinite, so suppression of the price is just temporary, the actual problem that could piss of actual OG Bitcoin whales is the decrease of hashrate. Bitcoin holders that are here for long term don't give a fuck about fiat prices, but they do care about hashrate numbers, since the higher the hashrate the more secure the network becomes.
If idiots like Craig Wright and Ver want to play around with their altcoins by stealing hashrate from Bitcoin, there is a certain margin that you can do that until unfortunately some hardcore Bitcoin whale puts a price on your head.