The most mysterious Casascius product is the 10,000 LTC bar, of which virtually nothing is known. The only available clue is this photo, which does nothing more than confirm that Casascius once produced a bar with ‘10000 LTC | *Ten Thousand Litecoins*’ written across it in the same format as for other high-denomination bars. It is not known how many were produced or if any were funded or sold. The pictured bar was given to Charlie Lee along with a 100,000 LTC bar. Charlie Lee is an influential figure in the cryptocurrency space, having been the creator of Litecoin. Along with this bar, he was given a few dozen ‘acrylic Litecoin rounds’. These consist of acrylic ‘rounds’ laser-engraved with the Litecoin ‘L’ logo, and are the only non-metallic coin created by Casascius. Of those, less than 50 are known to exist.