maybe in the future all token holders need KYC so that a token cannot be misused for bad or illegal things. Is it possible
Yes I believe that will be possible in the nearest future, it will become a criteria for the development of any token in the future to enable KYC and that is where the real regulations will cone in. Once every cryptocurrency have the feature of knowing your customers it will be easy for the authority to trace any illegal dealings that may be carried out using such coin.