Why should we discuss something that is known that is not going to happen, as you said in your post?
I think a scenario where the sha256 is broken but other algos not would be more realistic
Ok well how about if bitcoin fails and takes down most altcoins with it, what would happen to the remaining unaffected altcoins? Like Monero which I understand works in a completely different way?
I see bitcoin as the main coin, if bitcoin collapses, everything will go down with it. But why would you want to assume or speculate about something negative?
I would like to see some realistic stuff around here that's actually reachable.