short answer is:
NO.
first of all last time the fork was canceled you are saying this time a fork is happening. how can you think these two are the same
secondly last time it was a big incident. SegWit2x was a hard fork that many were expecting, it was related to the scaling debate. and it had a huge miners support. when it got canceled the bitcoin cash team started their FUD machine to pump BCH and it caused a lot of issues for bitcoin including the big drop.
compared to that, nobody even knew about bitcoin diamond fork until today that multiple topics have been created all over the forum!!! this means nobody even cares about it, whether it happens or not, nothing will change with neither bitcoin nor altcoins.
and finally my prediction of BCD is that it will be less than 0.001
BTC and probably will drop down to 0.00001
BTC (1000 satoshi) and less in the first week, because as i said nobody knows or cares about this one and when they find out they will start dumping it fast.