After thinking about it for not too long (and after cuddling in foetal position for some good 10 minutes realizing how consensus-less fanatics have provocked this abrupt awaken of a beutiful dream) by now I am cashing my BTC immediately.
This is actually great news for Bitcoin holders (seriously). People are dumping for dumb reasons (is it news to anyone that there is a contentious scaling debate)? Meanwhile, the major obstacle to scaling is declaring that they are going off and creating their own altcoin, and in doing so signaling that BIP148 must have greater strength than generally realized, which means it is likely to succeed now.
In short: Bitcoin price is down at precisely the time when we can see some light at the end of the tunnel.