I don't think that markets are crashing because of the non adoption of segwit. The thing is, bitcoin's speculative market would likely benefit gelreatly if consensus was finally reached. So far though, in spite of the lack of agreement among parties with influence, the price reached ATH levels. This is indicative that speculators don't really care.
I think everyone got excited because they thought @Gmaxwell could slay Bitmain. But now the reality is starting to hit people. Bitcoin is NEVER going to get any more significant changes to its protocol.
Looks to me that BTC is topping out again and another ride down awaits.
Should have traded BTC's top for LTC's recent bottom. Trade it like a seesaw.