I think 75% of bonus is a little more than usual and this often creates more dumping on the first listing of the token on any exchange. It would be better if you limit the buying per person then no one can horde more and coin will not get dumped.
If there is KYC implemented then you can limit the purchase per person. Otherwise it is not possible to install such a limit.
they can limit it without KYC, thats no problem. Really ICO investors have two or more parts of KYC documents for different people.
It all depends of KYC type, cause some of the KYC's require online selfie with passport, so you cant have two or more parts of KYC documents