In case you didn't notice, a big crash is already going on, and will likely not stop. Other superior and green crypto are rapidly taking Bitcoin Cores place. Bitcoin does not scale. There are hundreds of thousands of people waiting for their insanely expensive transactions to be confirmed. Most of these people will realize Bitcoin Core project has failed.
There goes the number 1 hater of bitcoin and his FUD, its true that the fees per transaction is quite out of hand right now but it still doesnt signified that bitcoin core is a failed project, the people you say "most" are the ones who are spreading FUD.
I have no problem with other alts even those who copied the name of Bitcoin because we are in an open market and we should be welcoming any new player anytime. However, it is not good if we have to destroy one to build the other since they are actually co-existing peacefully. Only time can tell which of these many coins we have will eventually survive years from now. Will it still be Bitcoin or will it be Ethereum or will it be BitcoinCash? I don't want to give my prediction because I don't have the power to peep into the future.