The swings absolutely were caused by anxiety/relief around this event.
The reason the hash power signaling is not so stable right now has a technical reason-- Bip-91 is rushed, the Segwit2x proposal was rather late in the game and this is a system which, by design and prudence, should not be changing with quick untested commits.
Here is the volatility index: https://www.buybitcoinworldwide.com/volatility-index/
You can notice that bitcoin went in the last few months through a volatility peak that didn't correct and is now surging again (in volatility).
This was written 2 days ago: https://www.linkedin.com/pulse/how-manipulate-bitcoin-market...
It's a gambler's {x} could be understood to mean, "prioritizing the desires of players of games of chance." A casino that has many rigged games (beyond the tuning of the odds in favor of the house) wouldn't be considered to be a "gambler's." If you're saying that buying bitcoin is "a gamble," then this may be true, contingent on how much information you're operating on. I'd say that things are happening to Bitcoin, and the more information one has on these things, the more you can narrow down what will happen to the forks.
https://vlab.stern.nyu.edu/analysis/VOL.BTCUSD:FOREX-R.GARCH
People always try to assign a reason to things. We don't like accepting that there just aren't any reasons. But as someone who has seen bitcoin go up and down and back again over years, there really isn't a reason for it besides "people decided to buy or sell." And those people aren't operating with logic. It's speculation.
People were saying the exact same things about Silk Road. If Silk Road closes, bitcoin will go down! Nope, didn't happen.