Hi! We really appreciate the sentiment, it means a lot that you like the game so much that you'd be willing to get a tattoo based on it. And yes, the tattoos you saw are an upcoming bit of content (not on Build 0.5 though, it'll come in later).
That said, we talked and we'd recommend you wait and think this through. While the tattoos are already in the game's code we might tinker with them a bit still so things may change, but mainly it's that the game is not ready yet and, well, in case you or others come to dislike it in the future for whatever reason (Game of Thrones, for example, was really beloved but things didn't end well) we wouldn't want you to have a permanent tattoo of something you no longer like.
Sorry if this isn't what you wanted to hear! It's just that we really appreciate your sentiment, and we wouldn't want to put you in a situation where you may regret things. But again, we are very honored to hear that you like the game so much.