KYC for big investors is already required in every project, even small investors are required to verify KYC but not as complex as big investors, and KYC for bounty is to avoid multiple account fraud
But most projects are working in terms of big investors favor because they need them for collecting more money in quicker time. We cannot expect devs to be more strict against big investors. I have seen some projects were providing big discounts to whales because it is an easy way to make their project successful.
I'm not finding implementing KYC will be helping the project to be successful by preventing whales from dumping. One whales is nothing but the a group of small investors in some assumption. How we can restrict small investors not to dump in other case.