Almost verbatim copy of rikamafluka09 on Medium - just some formatting and images were removed. IMHO, that user might now welcome what you did. If he posted it on permissive license, you probably should at least indicate that clearly. OTOH, to be honest, rikamafluka09 in turn took everything from https://inscoin.co/ homepage, also missing proper attribution, but that does not mean you can in turn steal his work ;) He at least redacted and formatted the text (or got it from the coin owners, who knows). Or maybe you are affiliated with the coin team? I dont see any note anywhere.