IYKYK is an abbreviation, which stands for "If you know, you know", and its Chinese meaning is "If you know, then you naturally know", a more popular saying is "everyone who knows understands (dddd)".

This sounds like nonsense? Not really. The background information of some topics, projects, technologies or events in the Crypto community is relatively complex, and only those who understand this information can understand the logic. And when this information is mentioned, people use IYKYK to mean that only those with the background information can truly understand what it means.

IYKYK was first included in Urban Dictionary in April 2016 and has become a widely used term in the Crypto community to draw attention to certain posts. You can often find posts with the hashtag #IYKYK on Twitter, especially when new projects are launched.

In short, you can simply understand IYKYK as a subtle self-promotion, because only people who know this special knowledge or experience can truly understand it.