He might actually share it with you because for him to have come and ask for the opinion of the community on a strategy such as this, I won't be surprised if he thinks you want to reward his friend for such a brilliant idea. @Op the strategy your friend shared with you is a selfish one which makes exploit the innocent ignorance of people for their own interest. It means that making a coin more valuable than it is then sell which means ripping off those who wants to just trade legitimately and decently. If you don't know well enough, you might just ended wasting your fund because the awareness of pump and dump is already on the increase that investing blindly is no longer the order of the day.