There is 4.87 BTC contained within the image shown below via private key. Follow through this thread to help navigate yourself through the start to finish of this elaborate puzzle! There are a lot of cool crypto techniques used during this journey...
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I was just catching up on Coin_Artist's puzzle and came across a cryptic message with a link in the comments, the comment is 10 days old. Doesn't appear to be from Coin_Artist, the message is a bit puzzling.