I don't get it. It will actually be bad for BOTH chains if indeed Bitcoin forks into two. Some people who are following the space could see this as a weakness and another reason not to start investing or accepting BTC as payments. Imagine if you were a merchant and you have to go thru and be involved in this sh*t, with all the debates and the drama. And worst of all the uncertainty of BTC's future.
I suppose those that think BU will skyrocket are fully behind BU but the truth is if a fork happened then I expect a crash to follow immediately after the fork happen as uncertainty takes over the markets and some use this opportunity to spread even more FUD to try to crash the price even further.
I agree with you that BU being accepted and fork happening will crash btc price immediately if not slowly but surely. BU might not make price to the moon and even if it split into two, I think people will just look on to the BTC that exist before fork happens disregarding BU and will result to it dying. I just really hope that this debates comes to a close so that bitcoin can be on a constant rise again.