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I don't think there is any such information from an insider, unless the insider is really shady and unprofessional. It is true that such information can give an advantage to whoever receives it because he is one step ahead of others, but I am sure that there is no such thing. I have never come across a case where someone got that kind of information from an insider, if there is then that person (insider) should be fired and punished.
You are saying there was no of Trump family that knew about his Trump coin before it was launched that night? There was none of Trump family that knew about his melenia meme coin before it was launch? The thing, there is always an insider no matter what but because of security and exchange commission enforcement, they drastically reduce it but it's there till now but they share it on the low so they don't get exposed, this is why the rich keep getting richer.
Check all centralized exchanges, they do have an insider no matter what but we don't have all this details until you see a SEC clamp on them with law suit that's when they get exposed about insider trading. Even Binance that is known for putting the community first before their employees were once charge with insider infor trading and this lead to mass sacking of some of their staffs, there is always an insider information everywhere.