This dump was triggered by the battle of the hashes. If we remove bch and bsv from having any value it would discourage more pointless bitcoin dilution, and prevent further hash wars.
Failure to act will cause more similar situations in the future
You cannot dictate other's here to stop buying BCH or any other crypto dude, as long as there is buyer and seller it will always have a repetition on this in the market. Actually, as much as there is a big investors who are the manipulators for sure everything will always be same even for the future for sure in my opinion.