You would have structure tour subject to fit the third person pronoun. Like "Some said crypto is a Scam". But the way you placed it, it looks like you are the one saying it. And for those that do not read the content before replying from the topic might say contrary to your content. You have a semi long thread and this not the first time someone has said that. And investment that someone has been doing for about 16 years will never be a scam. And those who have been saying this have been joining the investment so your friend or whatever he is to you case will not be different.
When I started, many warned me but today they are sending their children foe me to teach them.