Could Nov 16th 2017 be Bitcoin's Armageddon Day?

I have a serious question here that I'd appreciate any feedback on. Let me preface this by saying I've been mining, hording, and trading BTC and Alts for the last few years, and the upcoming BTC fork on November 16th, 2017, when block #494,784 is mined, is the most concerned I've ever been.  This is why:

Up until now the BTC ticker has always been on the "right side" of any forks.  I know that's really just this past summer's fork with BCC because I'm ignoring Bitcoin Gold, but I also think of the ETH fork that led to ETC and how ETH stayed on the right side of that fork (IMHO).  The "big" coins have always maintained the ticker on the right side of the fork.

But, I think that all changes with this next fork.  Even if you disagree with me, go with me here, we'll cover that at the end.  If I understand it correctly, and at least going by what Coinbase is going to do, the BTC ticker will stay with the non-segwit fork and the fork with SegWit2x will become B2X. That seems backwards and scares the hell out of me. Segwit is endorsed by 80%+ of the miners and therefore appears to be the clear winner to me.  Segwit already started with the August softfork and if 80% of the hashpower supports it, the opposing BTC is very vulnerable to attack. Supposedly 80% of the "community", whatever that means, opposes the fork, but that's a hard number to measure and I'm not sure it really matters as compared ot the miners.

But to give up the BTC moniker to the non-Segwit fork scares the hell out of me.

Think about all the exchanges and how almost every chart and trade is based upon the BTC value.  Almost every Alt is compared to BTC as opposed to USD or some other fiat currency.  How is that going to be handled.  If the value of the NEW BTC coin crashes, the Alt exchange rate should skyrocket.  That in and of itself could fire any number of automated trading triggers and/or lead to total confusion.  

Are the exchanges all going to change to Alt pricing based on B2X on fork day?  Will some change, will none?  Sounds like a lot of confusion to me.

Equally importantly, how much of the public will hold on to the BTC ticker not knowing any better.  After the fork, shouldn't the public really be using B2X instead if that's what 80% of the miners are mining?  How are transactions going to go through with 20% mining power?  If you think it takes a long time to get confirmations now, try dropping of 80% of the mining power to process those transactions. Trying to get that message out could be a nightmare.

When the fork occurs and the new coin gets "issued", you can expect the value of the 2 coins combined to be about equal to what one BTC is worth prior to the fork.  Yes there is some fudge factor there, but that's just normal behavior.  For example if BTC is at $6k right before the fork and the new BTC coin trades at about $1k then you could expect B2X to trade at about $5k.  They will diverge over time as each finds it's own market, but the scramble to sell at what may be peak price right after the fork could be disastrous.  Think of BCC and how the people who could sell BCC right after the fork made a killing while those waiting for their BCC to become tradeable got left with a fraction of the initial value. 

Why wouldn't the same think happen here, only now MOST people won't know that B2X is the "real" BTC.  B2X could easily crash in price just from people trying to move to cash.  I know I plan on liquidating all my BTC and B2X as soon as humanly possible after the fork and wait until it all shakes out before getting back in.  I sure can't be alone in that thinking.  That amount of selling can easily SLAM the price of both and even lead to insolvency for a lot of exchanges and especially leveraged traders.

Is there any reason I shouldn't be this nervous?  I know there is a lot of arguing going on about the fork but you never see it laid out like this (at least I don't).  This is what I see as the real-world consequences of what is fast approaching.