Currency 4.0 is an edition of the "Currency" series of conceptual artworks, a meta-performance that plays out on valuation, pre and post minting of the artwork. In this series each minted currency follows its own trajectory of daily changes in value, either incrementing or decrementing. These changes accumulate over time and are recorded in the currency itself, so in effect the currency stores its own value chart perpetually from its inception, giving memory to the currency itself. 's' saves the current image and 'h' saves a txt file with the price values that have fluctuated overtime.